MESON Chess Problem Database
Problem Display
PID: 96717 (q7/r1pNNb1k/p1Q1p1p1/P1P1B1P1/2pP1P2/p1P5/Rb6/1B1K4 w - - 0 1)
Stewart, John
The Chess Problem, 1943
#2
13 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxc6
- 2.Sf8#
- 1...Qb7
- 2.Sf8#
- 1...Qb8
- 2.Qh1#
- 1...Qc8
- 2.Qh1#
- 1...Qd8
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qf8
- 2.Sxf8#
- 1...Qg8
- 2.Qh1#
- 1...Qh8
- 2.Qh1#
- 1...Rb7
- 2.Qh1#
- 1...Ba1
- 2.Rh2#
- 1...Bc1
- 2.Rh2#
- 1...Bxc3
- 2.Rh2#
- 1...Be8
- 2.Sf8#
- 1...Bg8
- 2.Bxg6#
- 1...Qxc6
- Tries
- 1.Ke1?
- 1...Qxc6
- 2.Sf8#
- 1...Qb7
- 2.Sf8#
- 1...Qb8
- 2.Qh1#
- 1...Qc8
- 2.Qh1#
- 1...Qd8
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qf8
- 2.Sxf8#
- 1...Qg8
- 2.Qh1#
- 1...Qh8
- 2.Qh1#
- 1...Rb7
- 2.Qh1#
- 1...Ba1
- 2.Rh2#
- 1...Bc1
- 2.Rh2#
- 1...Be8
- 2.Sf8#
- 1...Bg8
- 2.Bxg6#
- 1...Bxc3+!
- 1...Qxc6
- 1.Bd3?
- 1...Qxc6
- 2.Sf8#
- 1...Bxc3
- 2.Rh2#
- 1...Ba1
- 2.Rh2#
- 1...Qb7
- 2.Sf8#
- 1...Qb8
- 2.Qh1#
- 1...Qc8
- 2.Qh1#
- 1...Qd8
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qf8
- 2.Sxf8#
- 1...Qg8
- 2.Qh1#
- 1...Qh8
- 2.Qh1#
- 1...Rb7
- 2.Qh1#
- 1...Bc1
- 2.Rh2#
- 1...Be8
- 2.Sf8#
- 1...Bg8
- 2.Bxg6#
- 1...cxd3!
- 1...Qxc6
- 1.Bf6?
- 1...Qxc6
- 2.Sf8#
- 1...Bxc3
- 2.Rh2#
- 1...Ba1
- 2.Rh2#
- 1...Qb7
- 2.Sf8#
- 1...Qb8
- 2.Qh1#
- 1...Qc8
- 2.Qh1#
- 1...Qd8
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qf8
- 2.Sxf8#
- 1...Qg8
- 2.Qh1#
- 1...Qh8
- 2.Qh1#
- 1...Rb7
- 2.Qh1#
- 1...Bc1
- 2.Rh2#
- 1...Be8
- 2.Sf8#
- 1...Bg8
- 2.Bxg6#
- 1...e5!
- 1...Qxc6
- 1.Rxb2?
- threat
- 2.Rh2#
- 1...Qf8
- 2.Sxf8#
- 1...axb2!
- threat
- 1.Qg2?
- threat
- 2.Qh3#
- 2.Qh2#
- 1...Qxg2
- 2.Sf8#
- 1...Qf8
- 2.Sxf8#
- 1...Qf3+!
- threat
- 1.Qf3?
- threat
- 2.Qh5#
- 2.Qh3#
- 1...Qe4
- 2.Sf8#
- 2.Qh3#
- 1...Qf8
- 2.Sxf8#
- 1...Qxf3+!
- threat
- 1.Qd5?
- 1...Qxd5
- 2.Sf8#
- 1...Bxc3
- 2.Rh2#
- 1...Ba1
- 2.Rh2#
- 1...Qc6
- 2.Sf8#
- 1...Qb7
- 2.Sf8#
- 1...Qb8
- 2.Qh1#
- 1...Qc8
- 2.Qh1#
- 1...Qd8
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qf8
- 2.Sxf8#
- 1...Qg8
- 2.Qh1#
- 1...Qh8
- 2.Qh1#
- 1...Rb7
- 2.Qh1#
- 1...Bc1
- 2.Rh2#
- 1...Be8
- 2.Sf8#
- 1...Bg8
- 2.Bxg6#
- 1...c6
- 2.Qh1#
- 1...exd5!
- 1...Qxd5
- 1.Qxa8?
- threat
- 2.Sf8#
- 2.Qh1#
- 2.Qh8#
- 1...Rb7
- 2.Sf8#
- 2.Qh8#
- 1...Be8
- 2.Sf8#
- 2.Qh1#
- 1...Bg8
- 2.Sf8#
- 2.Bxg6#
- 2.Qh1#
- 2.Qxg8#
- 1...c6
- 2.Sf8#
- 2.Qh8#
- 1...Rxa8!
- threat
- 1.Ke1?
- Keys
- 1.Qe4!
- 1...Qxe4
- 2.Sf8#
- 1...Bxc3
- 2.Rh2#
- 1...Ba1
- 2.Rh2#
- 1...Qd5
- 2.Sf8#
- 1...Qc6
- 2.Sf8#
- 1...Qb7
- 2.Sf8#
- 1...Qb8
- 2.Qh1#
- 1...Qc8
- 2.Qh1#
- 1...Qd8
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qf8
- 2.Sxf8#
- 1...Qg8
- 2.Qh1#
- 1...Qh8
- 2.Qh1#
- 1...Rb7
- 2.Qh1#
- 1...Bc1
- 2.Rh2#
- 1...Be8
- 2.Sf8#
- 1...Bg8
- 2.Qxg6#
- 1...c6
- 2.Qh1#
- 1...Qxe4
- 1.Qe4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(k);N_GUARD,XQ(K)::S(L)
- Q(k);N_GUARD::S(L)
- Q(k);N_GUARD::QAR(K)
- Q(k);N_GUARD::S(L),XQ(k)
- R(g);S_CUTQ(k)::QAR(K)
- B(a);OGATE::R(C)
- B(a);OGATE,XP(D)::R(C)
- B(i);S_CUTQ(k)::S(L)
- B(i);N_GUARD::B(A),XP(f)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- Q(k);N_GUARD,XQ(K)::S(L)
- Q(k);N_GUARD::S(L)
- Q(k);N_GUARD::QAR(K)
- Q(k);N_GUARD::S(L),XQ(k)
- R(g);S_CUTQ(k)::QAR(K)
- B(a);OGATE::R(C)
- B(i);S_CUTQ(k)::S(L)
- B(i);N_GUARD::B(A),XP(f)
- Refutation
- B(a);CHECK,XP(D)
- Try
- B(A);
- Vars
- Q(k);N_GUARD,XQ(K)::S(L)
- B(a);OGATE,XP(D)::R(C)
- B(a);OGATE::R(C)
- Q(k);N_GUARD::S(L)
- Q(k);N_GUARD::QAR(K)
- Q(k);N_GUARD::S(L),XQ(k)
- R(g);S_CUTQ(k)::QAR(K)
- B(i);S_CUTQ(k)::S(L)
- B(i);N_GUARD::B(A),XP(f)
- Refutation
- P(c);N_SPINP(f),XB(A)
- Try
- B(I);
- Vars
- Q(k);N_GUARD,XQ(K)::S(L)
- B(a);OGATE,XP(D)::R(C)
- B(a);OGATE::R(C)
- Q(k);N_GUARD::S(L)
- Q(k);N_GUARD::QAR(K)
- Q(k);N_GUARD::S(L),XQ(k)
- R(g);S_CUTQ(k)::QAR(K)
- B(i);S_CUTQ(k)::S(L)
- B(i);N_GUARD::B(A),XP(f)
- Refutation
- P(e);
- Try
- R(C);XB(a)
- Threat
- R(C)
- Vars
- Q(k);N_GUARD::S(L),XQ(k)
- Refutation
- P(b);XR(C)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- Q(k);N_GUARD,XQ(K)::S(L)
- Q(k);N_GUARD::S(L),XQ(k)
- Refutation
- Q(k);CHECK
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- Q(k);N_GUARD::S(L),XQ(k)
- Refutation
- Q(k);CHECK,XQ(K)
- Try
- Q(K);
- Vars
- Q(k);N_GUARD,P_PINP(E),XQ(K)::S(L)
- B(a);OGATE,XP(D)::R(C)
- B(a);OGATE::R(C)
- Q(k);N_GUARD::S(L)
- Q(k);N_GUARD::QAR(K)
- Q(k);N_GUARD::S(L),XQ(k)
- R(g);S_CUTQ(k)::QAR(K)
- B(i);S_CUTQ(k)::S(L)
- B(i);N_GUARD::B(A),XP(f)
- P(h);S_CUTQ(k)::QAR(K)
- Refutation
- P(e);XQ(K)
- Try
- Q(K);XQ(k)
- Threat
- DUALS(3)
- Refutation
- R(g);XQ(K)
- Try
- Actual
- Q(K);
- Vars
- Q(k);N_GUARD,N_SPINP(f),XQ(K)::S(L)
- B(a);OGATE,XP(D)::R(C)
- B(a);OGATE::R(C)
- Q(k);N_GUARD,P_PINP(E)::S(L)
- Q(k);N_GUARD::S(L)
- Q(k);N_GUARD::QAR(K)
- Q(k);N_GUARD::S(L),XQ(k)
- R(g);S_CUTQ(k)::QAR(K)
- B(i);S_CUTQ(k)::S(L)
- B(i);N_GUARD::QAB1(K),XP(f)
- P(h);S_CUTQ(k)::QAR(K)
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).