MESON Chess Problem Database
Problem Display
PID: 101364 (4r3/r2R4/b2B4/1p1N4/1K1kP1R1/7Q/1n2P1pP/1n4b1 w - - 0 1)
Janet, Frank
Good Companions, 1919
#2
9 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Bc5#
- 1...Rh8
- 2.Qxh8#
- 1...Bxh2
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Sd2
- 2.Qc3#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd1
- 2.Qd3#
- 1...Sd3+
- 2.Qxd3#
- 1...Sa4
- 2.Qd3#
- 1...Sc4
- 2.Qd3#
- 1...Re5
- Tries
- 1.Sc3?
- threat
- 2.Bc7#
- 2.e5#
- 1...Sd3+
- 2.Qxd3#
- 1...Rxd7
- 2.e5#
- 1...Rxe4
- 2.Bc7#
- 2.Rxe4#
- 1...Sxc3
- 2.Qxc3#
- 1...Rc7
- 2.Bxc7#
- 2.e5#
- 1...Re5
- 2.Bc5#
- 1...Re6
- 2.e5#
- 1...Re7
- 2.e5#
- 1...Rd8
- 2.e5#
- 1...Rf8
- 2.Bc7#
- 1...Rg8
- 2.Bc7#
- 1...Be3
- 2.Bc7#
- 1...Bb7
- 2.Sxb5#
- 1...Bc8
- 2.Sxb5#
- 2.e5#
- 1...Sd2
- 2.Bc7#
- 1...Sc4
- 2.Qd3#
- 2.e5#
- 1...Bxh2!
- threat
- 1.Se3?
- threat
- 2.Sc2#
- 2.Sf5#
- 2.Bc7#
- 2.e5#
- 1...Rxd7
- 2.Sc2#
- 2.Sf5#
- 2.e5#
- 1...Rxe4
- 2.Bc7#
- 1...Bxh2
- 2.Sc2#
- 2.Sf5#
- 1...Bxe3
- 2.Bc7#
- 1...Rc7
- 2.Sf5#
- 2.Bxc7#
- 2.e5#
- 1...Re5
- 2.Sc2#
- 2.Bc5#
- 1...Re6
- 2.Sc2#
- 2.Sf5#
- 2.e5#
- 1...Re7
- 2.Sc2#
- 2.Sf5#
- 2.e5#
- 1...Rc8
- 2.Sf5#
- 2.Bc7#
- 2.e5#
- 1...Rd8
- 2.Sc2#
- 2.Sf5#
- 2.e5#
- 1...Rf8
- 2.Sc2#
- 2.Bc7#
- 1...Rg8
- 2.Sc2#
- 2.Sf5#
- 2.Bc7#
- 1...Bb7
- 2.Sc2#
- 2.Sf5#
- 1...Bc8
- 2.Sc2#
- 2.Sf5#
- 2.e5#
- 1...Sd2
- 2.Sc2#
- 2.Sf5#
- 2.Bc7#
- 1...Sa3
- 2.Sf5#
- 2.Bc7#
- 2.e5#
- 1...Sc3
- 2.Sc2#
- 2.Sf5#
- 1...Sc4
- 2.Sc2#
- 2.Sf5#
- 2.e5#
- 1...Sd3+!
- threat
- 1.Se7?
- threat
- 2.Sf5#
- 2.Sc6#
- 2.Bc7#
- 2.e5#
- 1...Sd3+
- 2.Qxd3#
- 1...Rxd7
- 2.Sf5#
- 2.Sc6#
- 2.e5#
- 1...Bxh2
- 2.Sf5#
- 2.Sc6#
- 1...Bb7
- 2.Sf5#
- 1...Rc7
- 2.Sf5#
- 2.Bxc7#
- 2.e5#
- 1...Rc8
- 2.Sf5#
- 2.Bc7#
- 2.e5#
- 1...Rd8
- 2.Sf5#
- 2.Sc6#
- 2.e5#
- 1...Rf8
- 2.Sc6#
- 2.Bc7#
- 1...Rg8
- 2.Sf5#
- 2.Sc6#
- 2.Bc7#
- 1...Be3
- 2.Sf5#
- 2.Sc6#
- 2.Bc7#
- 1...Bc8
- 2.Sf5#
- 2.Sc6#
- 2.e5#
- 1...Sd2
- 2.Sf5#
- 2.Sc6#
- 2.Bc7#
- 2.Qc3#
- 1...Sc3
- 2.Sf5#
- 2.Sc6#
- 2.Qxc3#
- 1...Sc4
- 2.Sf5#
- 2.Sc6#
- 2.Qd3#
- 2.e5#
- 1...Rxe7!
- threat
- 1.Bc7?
- threat
- 2.Sc3#
- 2.Se3#
- 2.Sb6#
- 2.Sf6#
- 2.Se7#
- 2.e5#
- 1...Sd3+
- 2.Qxd3#
- 1...Rxe4
- 2.Sc3#
- 2.Se3#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Se7#
- 2.Qh8#
- 1...Bxh2
- 2.Qe3#
- 1...Bb7
- 2.e5#
- 1...Re5
- 2.Bb6#
- 1...Re6
- 2.e5#
- 1...Re7
- 2.Sxe7#
- 2.e5#
- 1...Rd8
- 2.e5#
- 1...Rf8
- 2.Sc3#
- 2.Se3#
- 2.Sb6#
- 2.Sf6#
- 2.Se7#
- 1...Rg8
- 2.Sc3#
- 2.Se3#
- 2.Sb6#
- 2.Sf6#
- 2.Se7#
- 1...Be3
- 2.Sc3#
- 2.Sxe3#
- 2.Sb6#
- 2.Sf6#
- 2.Se7#
- 2.Qxe3#
- 1...Bc8
- 2.e5#
- 1...Sd2
- 2.Sc3#
- 2.Se3#
- 2.Sb6#
- 2.Sf6#
- 2.Se7#
- 2.Qc3#
- 1...Sc3
- 2.Sxc3#
- 2.Qxc3#
- 1...Sc4
- 2.Qd3#
- 2.e5#
- 1...Rxc7!
- threat
- 1.Qf3?
- threat
- 2.e5#
- 1...Sd3+
- 2.Qxd3#
- 1...Rxe4
- 2.Qxe4#
- 1...Bxh2
- 2.Qf2#
- 2.Qe3#
- 1...Re5
- 2.Bc5#
- 1...Rg8
- 2.Qf6#
- 1...Be3
- 2.Qxe3#
- 1...Sd2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Rf8!
- threat
- 1.Qg3?
- threat
- 2.Bc5#
- 1...Sd3+
- 2.Qxd3#
- 1...Rc8
- 2.Be5#
- 2.Qe5#
- 1...Sa4
- 2.Qd3#
- 1...Rc7!
- threat
- 1.Qh8+?
- 1...Re5
- 2.Bc5#
- 2.Bxe5#
- 2.Qxe5#
- 1...Rxh8!
- 1...Re5
- 1.e3+?
- 1...Bxe3
- 2.Qxe3#
- 1...Kd3!
- 1...Bxe3
- 1.Sc3?
- Keys
- 1.Sc7!
- threat
- 2.e5#
- 1...Sd3+
- 2.Qxd3#
- 1...Rxc7
- 2.Bxc7#
- 1...Rxe4
- 2.Bf4#
- 1...Bxh2
- 2.Bxh2#
- 1...Bb7
- 2.Sxb5#
- 1...Re5
- 2.Bc5#
- 1...Rf8
- 2.Se6#
- 1...Rg8
- 2.Se6#
- 1...Be3
- 2.Bg3#
- 1...Sd2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- threat
- 1.Sc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 5
- Sets
- R(i);SBLOCK::B(H)
- R(i);N_GUARD::QAB(C),XR(i)
- B(b);N_GUARD,XP(B)::QAB1(C)
- B(b);N_GUARD::QAB1(C),XB(b)
- S(a);N_GUARD::QAB1(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(c);N_GUARD::QAR1(C)
- S(c);CHECK,N_GUARD::QAR1(C),XS(c)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- S(c);CHECK,N_GUARD::QAR1(C),XS(c)
- R(h);XR(I)::R(F)+P(E)
- S(a);OGATE,XS(G)::QAB1(C),XS(a)
- R(i);SBLOCK::R(I)+B(H),DCHECK
- R(i);::R(F)+P(E)
- R(i);::R(I)+B(H)
- B(b);::R(I)+B(H)
- B(g);N_GUARD::S(G),XP(f)
- S(a);::R(I)+B(H)
- Refutation
- B(b);XP(B)
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- R(i);P_SPINR(i),XP(E)::R(I)+B(H)
- B(b);XS(G)::R(I)+B(H)
- Refutation
- S(c);CHECK
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- S(c);CHECK,N_GUARD::QAR1(C),XS(c)
- B(g);::S(G)
- Refutation
- R(i);XS(G)
- Try
- B(H);
- Threat
- DUALS(6)
- Vars
- S(c);CHECK,N_GUARD::QAR1(C),XS(c)
- B(b);N_GUARD,XP(B)::QAB1(C)
- B(g);::R(F)+P(E)
- R(i);SBLOCK::B(H)
- R(i);::R(F)+P(E)
- Refutation
- R(h);XB(H)
- Try
- Q(C);
- Threat
- R(F)+P(E)
- Vars
- S(c);CHECK,N_GUARD::QAR1(C),XS(c)
- R(i);OGATE,P_SPINR(i),XP(E)::QAR1(C),XR(i)
- R(i);SBLOCK::B(H)
- R(i);N_GUARD::QAB(C)
- B(b);N_GUARD::QAB1(C),XB(b)
- S(a);N_GUARD::QAB1(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- Refutation
- R(i);
- Try
- Q(C);
- Threat
- B(H)
- Vars
- S(c);CHECK,N_GUARD::QAR1(C),XS(c)
- S(c);N_GUARD::QAR1(C)
- Refutation
- R(h);
- Try
- Q(C);CHECK
- Refutation
- R(i);XQ(C)
- Try
- P(A);CHECK
- Vars
- B(b);OGATE,XP(A)::QAB1(C),XB(b)
- Refutation
- K(e);P-FLIGHT
- Try
- Actual
- S(G);
- Threat
- R(F)+P(E)
- Vars
- S(c);CHECK,N_GUARD::QAR1(C),XS(c)
- R(h);OGATE,XS(G)::R(I)+B(H),XR(h)
- R(i);P_SPINR(i),SBLOCK,XP(E)::R(I)+B(H)
- B(b);OGATE,XP(B)::R(I)+B(H),XB(b)
- B(g);N_GUARD::S(G),XP(f)
- R(i);SBLOCK::R(I)+B(H),DCHECK
- R(i);N_GUARD::S(G)
- B(b);SBLOCK::R(I)+B(H)
- S(a);N_GUARD::QAB1(C)
- S(a);N_GUARD::QAB1(C),XS(a)
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).