MESON Chess Problem Database
Problem Display
PID: 2970 (1Qb2r2/2K1N2R/p1P2k1p/P1N1p2B/2P3p1/3p2P1/3B4/8 w - - 0 1)
Williams, Philip Hamilton
Source?, 1914
#2
11 + 8
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rf7
- 2.Rxf7#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 2.Qxf8#
- 1...Be6
- 2.Se4#
- 1...Bb7
- 2.Qxf8#
- 1...Bd7
- 2.Qxf8#
- 1...e4
- 2.Qb2#
- 1...Rf7
- Tries
- 1.Kb6?
- 1...Rf7
- 2.Rxf7#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 2.Qxf8#
- 1...Be6
- 2.Se4#
- 1...Bb7
- 2.Qd6#
- 2.Qxf8#
- 1...Bd7
- 2.Qxf8#
- 1...e4!
- 1...Rf7
- 1.Kd6?
- threat
- 2.Se4#
- 1...Bf5
- 2.Sd5#
- 2.Qxf8#
- 1...e4
- 2.Sxe4#
- 2.Qb2#
- 1...Rd8+!
- threat
- 1.Sg8+?
- 1...Rxg8
- 2.Rf7#
- 1...Kf5!
- 1...Rxg8
- 1.Bc1?
- 1...Rf7
- 2.Rxf7#
- 1...e4
- 2.Qb2#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 2.Qxf8#
- 1...Be6
- 2.Se4#
- 1...Bb7
- 2.Qxf8#
- 1...Bd7
- 2.Qxf8#
- 1...d2!
- 1...Rf7
- 1.Be3?
- 1...Rf7
- 2.Rxf7#
- 1...e4
- 2.Qb2#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 2.Qxf8#
- 1...Be6
- 2.Se4#
- 1...Bb7
- 2.Qxf8#
- 1...Bd7
- 2.Qxf8#
- 1...d2!
- 1...Rf7
- 1.Bxh6?
- 1...Rf7
- 2.Rxf7#
- 1...e4
- 2.Qb2#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 2.Qxf8#
- 1...Be6
- 2.Se4#
- 1...Bb7
- 2.Qxf8#
- 1...Bd7
- 2.Qxf8#
- 1...d2!
- 1...Rf7
- 1.Bxg4?
- threat
- 2.Se4#
- 1...Bxg4
- 2.Qxf8#
- 1...e4
- 2.Qb2#
- 1...Bf5
- 2.Qxf8#
- 1...Rf7!
- threat
- 1.Bg6?
- 1...Rf7
- 2.Rxf7#
- 1...e4
- 2.Qb2#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Qxf8#
- 1...Be6
- 2.Se4#
- 1...Bb7
- 2.Qxf8#
- 1...Bd7
- 2.Qxf8#
- 1...h5!
- 1...Rf7
- 1.Qb1?
- 1...Rf7
- 2.Rxf7#
- 1...e4
- 2.Qa1#
- 2.Qb2#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 1...Be6
- 2.Se4#
- 1...Bb7
- 2.Qf1#
- 1...Bd7!
- 1...Rf7
- 1.Qa8?
- 1...Rf7
- 2.Rxf7#
- 1...Bb7
- 2.Qxf8#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 2.Qxf8#
- 1...Be6
- 2.Se4#
- 1...Bd7
- 2.Qxf8#
- 1...e4!
- 1...Rf7
- 1.Qxc8?
- threat
- 2.Se4#
- 2.Sd5#
- 2.Qf5#
- 2.Qe6#
- 2.Qxf8#
- 1...Rf7
- 2.Rxf7#
- 2.Qe6#
- 1...e4
- 2.Qf5#
- 2.Qe6#
- 1...Rd8
- 2.Se4#
- 2.Rf7#
- 2.Qf5#
- 2.Qe6#
- 1...Re8
- 2.Se4#
- 2.Sd5#
- 2.Rf7#
- 2.Qf5#
- 2.Qe6#
- 1...Rg8
- 2.Se4#
- 2.Sd5#
- 2.Sxg8#
- 2.Rf7#
- 2.Qf5#
- 2.Qe6#
- 1...Rh8
- 2.Se4#
- 2.Sd5#
- 2.Rf7#
- 2.Qf5#
- 2.Qe6#
- 2.Qxh8#
- 1...Rxc8+!
- threat
- 1.Kb6?
- Keys
- 1.Qb6!
- 1...Rf7
- 2.Rxf7#
- 1...e4
- 2.Qb2#
- 1...Bb7
- 2.cxb7#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Rh8
- 2.Rf7#
- 1...Bf5
- 2.Sd5#
- 1...Be6
- 2.Se4#
- 1...Bd7
- 2.cxd7#
- 1...Rf7
- 1.Qb6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(E)
- B(g);OGATE::QAR2(K),XR(h)
- P(c);OGATEB::QAB(K)
- Tries
- Try
- K(H);S_FLIGHT
- Vars
- R(h);N_GUARD::R1(J),XR(h)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(E)
- B(g);OGATE::QAR2(K),XR(h)
- Refutation
- P(c);
- Try
- K(H);S_FLIGHT
- Threat
- S(E)
- Refutation
- R(h);CHECK
- Try
- S(I);CHECK
- Vars
- R(h);XS(I)::R1(J)
- Refutation
- K(e);P-FLIGHT
- Try
- B(A);
- Vars
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- P(c);OGATEB::QAB(K)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(E)
- B(g);OGATE::QAR2(K),XR(h)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- P(c);OGATEB::QAB(K)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(E)
- B(g);OGATE::QAR2(K),XR(h)
- Refutation
- P(a);
- Try
- B(A);XP(f)
- Vars
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- P(c);OGATEB::QAB(K)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(E)
- B(g);OGATE::QAR2(K),XR(h)
- Refutation
- P(a);
- Try
- B(F);XP(b)
- Threat
- S(E)
- Vars
- B(g);OGATE,XB(F)::QAR2(K),XR(h)
- P(c);OGATEB::QAB(K)
- B(g);OGATE::QAR2(K),XR(h)
- Refutation
- R(h);P_PINS(I)
- Try
- B(F);
- Vars
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- P(c);OGATEB::QAB(K)
- R(h);N_GUARD::R1(J)
- B(g);OGATE::QAR2(K),XR(h)
- B(g);SBLOCK::S(E)
- Refutation
- P(f);
- Try
- Q(K);
- Vars
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(I)
- B(g);SBLOCK::S(E)
- B(g);N_GUARD::QAR(K)
- Refutation
- B(g);
- Try
- Q(K);
- Vars
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- B(g);OGATE::QAR2(K),XR(h)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(E)
- Refutation
- P(c);
- Try
- Q(K);XB(g)
- Threat
- DUALS(5)
- Refutation
- R(h);CHECK,XQ(K)
- Try
- Actual
- Q(K);
- Vars
- R(h);N_GUARD,P_PINS(I)::R1(J),XR(h)
- P(c);OGATEB::QAB(K)
- B(g);OGATE::QAR(K)+P(G),XB(g)
- R(h);N_GUARD::R1(J)
- B(g);SBLOCK::S(I)
- B(g);SBLOCK::S(E)
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).