MESON Chess Problem Database
Problem Display
PID: 2934 (1b3Kn1/pP1B4/N1Pp1RN1/p1rk1prn/2p1p3/2B1R3/3P4/1Q6 w - - 0 1)
Bolus, Andrew
Source?, 1912
#2
11 + 12
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rb5
- 2.Qxb5#
- 1...Rxc6
- 2.Be6#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Rxg6
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Shxf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...Rb5
- Tries
- 1.Kf7?
- 1...Rxc6
- 2.Be6#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rb5
- 2.Qxb5#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...Sh6+!
- 1...Rxc6
- 1.Sxb8?
- threat
- 2.Be6#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rb5
- 2.Qxb5#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Rxc6!
- threat
- 1.Ba1?
- 1...Rxc6
- 2.Be6#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rb5
- 2.Qxb5#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...c3!
- 1...Rxc6
- 1.Re1?
- 1...Rxc6
- 2.Be6#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rb5
- 2.Qxb5#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...e3!
- 1...Rxc6
- 1.Re2?
- 1...Rxc6
- 2.Be6#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rb5
- 2.Qxb5#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...e3!
- 1...Rxc6
- 1.Rxe4?
- threat
- 2.Rd4#
- 1...Rxg6
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...fxe4!
- threat
- 1.Rf7?
- 1...Rxg6
- 2.Rxf5#
- 1...Rb5
- 2.Qxb5#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Shf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sgf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...Rxc6!
- 1...Rxg6
- 1.Qc2?
- 1...Rxc6
- 2.Be6#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...Rb5!
- 1...Rxc6
- 1.Qg1?
- 1...Rxc6
- 2.Be6#
- 1...Rxg1
- 2.Rxf5#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxg5#
- 1...Rb5!
- 1...Rxc6
- 1.Qh1?
- 1...Rxc6
- 2.Be6#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Qxe4#
- 1...Rb5!
- 1...Rxc6
- 1.Qb2?
- 1...Rxc6
- 2.Be6#
- 1...Rxg6
- 2.Rxf5#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Rb5
- 2.Qxb5#
- 1...Rg1
- 2.Rxf5#
- 1...Rg2
- 2.Rxf5#
- 1...Rg3
- 2.Rxf5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4!
- 1...Rxc6
- 1.Qb5?
- threat
- 2.Be6#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Rxb5!
- threat
- 1.Qb6?
- threat
- 2.Be6#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...axb6!
- threat
- 1.Kf7?
- Keys
- 1.Rg3!
- 1...Rxc6
- 2.Be6#
- 1...Rxg3
- 2.Rxf5#
- 1...Rxg6
- 2.Rxf5#
- 1...Sxg3
- 2.Sf4#
- 1...Shxf6
- 2.Sf4#
- 1...Sgxf6
- 2.Se7#
- 1...e3
- 2.Qh1#
- 1...Rb5
- 2.Qxb5#
- 1...Rg4
- 2.Rxf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sf4
- 2.Sxf4#
- 1...Sg7
- 2.Sf4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a4
- 2.Sb4#
- 1...f4
- 2.Rxg5#
- 1...Rxc6
- 1.Rg3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(d);OGATEB::QAR2(A),XR(d)
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD::R(G),XP(f)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Tries
- Try
- K(K);P-FLIGHT
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(d);OGATEB::QAR2(A),XR(d)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Refutation
- S(l);CHECK
- Try
- S(E);XB(k)
- Threat
- B(J)
- Vars
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(d);OGATEB::QAR2(A),XR(d)
- S(h);N_GUARD::S(H),XS(h)
- S(h);N_GUARD::S(H)
- Refutation
- R(d);XP(F)
- Try
- B(C);
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(d);OGATEB::QAR2(A),XR(d)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Refutation
- P(a);
- Try
- R(D);
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(d);OGATEB::QAR2(A),XR(d)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Refutation
- P(b);
- Try
- R(D);
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(d);OGATEB::QAR2(A),XR(d)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Refutation
- P(b);
- Try
- R(D);XP(b)
- Threat
- R1(D)
- Vars
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- R(g);N_GUARD::R(G),XP(f)
- Refutation
- P(f);XR(D)
- Try
- R(G);
- Vars
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- R(d);OGATEB::QAR2(A),XR(d)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Refutation
- R(d);XP(F)
- Try
- Q(A);
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Refutation
- R(d);
- Try
- Q(A);
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XQ(A)::R(G),XP(f)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);OGATEB::QAR(A),XR(g)
- Refutation
- R(d);
- Try
- Q(A);P_PINP(b)
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(g);N_GUARD::R(G),XP(f)
- R(g);N_GUARD,N_SPINP(b)::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);N_GUARD::QAB1(A),XP(b)
- Refutation
- R(d);
- Try
- Q(A);
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- R(d);OGATEB::QAR2(A),XR(d)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- Refutation
- P(f);
- Try
- Q(A);P_PINR(d)
- Threat
- B(J)
- Vars
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(h);N_GUARD::S(H)
- Refutation
- R(d);N_SPINR(d),XQ(A)
- Try
- Q(A);
- Threat
- B(J)
- Vars
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- S(h);N_GUARD::S(H),XS(h)
- S(h);N_GUARD::S(H)
- Refutation
- P(j);XQ(A)
- Try
- Actual
- R(D);
- Vars
- R(d);SBLOCK,XP(F)::B(J)
- R(g);N_GUARD,XR(D)::R(G),XP(f)
- R(g);N_GUARD,XS(H)::R(G),XP(f)
- S(h);N_GUARD,XR(D)::S(H)
- S(h);N_GUARD,XR(G)::S(H)
- S(l);N_GUARD,XR(G)::S(H)
- P(b);OGATEB::QAB(A)
- R(d);OGATEB::QAR2(A),XR(d)
- R(g);N_GUARD::R(G),XP(f)
- B(k);N_GUARD::S(E),XB(k)
- S(h);N_GUARD::S(H),XS(h)
- S(h);N_GUARD::S(H)
- S(l);N_GUARD::S(H)
- S(l);N_GUARD::S(H),XS(l)
- P(c);N_GUARD::S(E)
- P(f);OGATEB::R(D),XR(g)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).