MESON Chess Problem Database
Problem Display
PID: 175033 (1nrBNK1b/2P2b1P/pN2k1p1/p3P3/Qp2RPP1/8/2p5/2n5 w - - 0 1)
Chapin, Irving
San Francisco Chronicle, 1901
#2
11 + 11
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxc7
- 2.Sxc7#
- 1...Rxd8
- 2.cxd8S#
- 1...Bxe8
- 2.Qxe8#
- 1...Bg8
- 2.hxg8Q#
- 2.hxg8B#
- 1...Bxe5
- 2.Rxe5#
- 1...Bf6
- 2.exf6#
- 1...Bg7+
- 2.Sxg7#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...Sc6
- 2.Qxc6#
- 1...Sd7+
- 2.Qxd7#
- 1...b3
- 2.Qc4#
- 1...g5
- 2.f5#
- 1...Rxc7
- Tries
- 1.Re1?
- 1...Bg7+
- 2.Sxg7#
- 1...Sd7+
- 2.Qxd7#
- 1...Rxc7
- 2.Sxc7#
- 1...Rxd8
- 2.cxd8S#
- 1...Bxe8
- 2.Qxe8#
- 1...Bxe5
- 2.Rxe5#
- 1...Bg8
- 2.hxg8Q#
- 2.hxg8B#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...Sc6
- 2.Qxc6#
- 1...b3
- 2.Qc4#
- 1...g5
- 2.f5#
- 1...Bf6!
- 1...Bg7+
- 1.Re2?
- 1...Bg7+
- 2.Sxg7#
- 1...Sd7+
- 2.Qxd7#
- 1...Rxc7
- 2.Sxc7#
- 1...Rxd8
- 2.cxd8S#
- 1...Bxe8
- 2.Qxe8#
- 1...Bxe5
- 2.Rxe5#
- 1...Sxe2
- 2.Qb3#
- 1...Bg8
- 2.hxg8Q#
- 2.hxg8B#
- 1...Sa2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...Sc6
- 2.Qxc6#
- 1...b3
- 2.Qc4#
- 1...g5
- 2.f5#
- 1...Bf6!
- 1...Bg7+
- 1.Rd4?
- threat
- 2.Rd6#
- 1...Bg7+
- 2.Sxg7#
- 1...Sd7+
- 2.Qxd7#
- 1...Rxd8
- 2.cxd8S#
- 1...Bxe5!
- threat
- 1.Qxc2?
- threat
- 2.Qc4#
- 1...Bg7+
- 2.Sxg7#
- 1...Rxc7
- 2.Sxc7#
- 1...Rxd8
- 2.cxd8S#
- 1...Sd7+!
- threat
- 1.Qb5?
- threat
- 2.Qc4#
- 2.Qd5#
- 1...Bg7+
- 2.Sxg7#
- 1...Sd7+
- 2.Qxd7#
- 1...Rxc7
- 2.Sxc7#
- 2.Qd5#
- 1...Rxd8
- 2.cxd8S#
- 1...axb5!
- threat
- 1.Qxa5?
- threat
- 2.Qd5#
- 1...Bg7+
- 2.Sxg7#
- 1...Rxd8
- 2.cxd8S#
- 1...Sd7+!
- threat
- 1.cxb8Q?
- threat
- 2.Qd7#
- 2.Qd6#
- 2.Qxc8#
- 1...Bg7+
- 2.Sxg7#
- 1...Rxb8
- 2.Sc7#
- 2.Qc6#
- 2.Qd7#
- 1...Bxe8
- 2.Qxe8#
- 2.Qd6#
- 1...Rc3
- 2.Qd7#
- 2.Qd6#
- 1...Rc4
- 2.Qd7#
- 2.Qd6#
- 1...Rc5
- 2.Qd7#
- 2.Qd6#
- 1...Rc6
- 2.Qxc6#
- 1...Rc7
- 2.Sxc7#
- 1...Rxd8!
- threat
- 1.cxb8S?
- threat
- 2.Qd7#
- 1...Bg7+
- 2.Sxg7#
- 1...Bxe8
- 2.Qxe8#
- 1...Rc6
- 2.Qxc6#
- 1...Rc7
- 2.Sxc7#
- 1...Rxd8!
- threat
- 1.cxb8B?
- threat
- 2.Qd7#
- 1...Bg7+
- 2.Sxg7#
- 1...Bxe8
- 2.Qxe8#
- 1...Rc6
- 2.Qxc6#
- 1...Rc7
- 2.Sxc7#
- 1...Rxd8!
- threat
- 1.cxb8R?
- threat
- 2.Qd7#
- 1...Bg7+
- 2.Sxg7#
- 1...Bxe8
- 2.Qxe8#
- 1...Rc6
- 2.Qxc6#
- 1...Rc7
- 2.Sxc7#
- 1...Rxd8!
- threat
- 1.Re1?
- Keys
- 1.Re3!
- 1...Bg7+
- 2.Sxg7#
- 1...Sd7+
- 2.Qxd7#
- 1...Rxc7
- 2.Sxc7#
- 1...Rxd8
- 2.cxd8S#
- 1...Bxe8
- 2.Qxe8#
- 1...Bxe5
- 2.Rxe5#
- 1...Bf6
- 2.exf6#
- 1...Bg8
- 2.hxg8Q#
- 2.hxg8B#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...Sc6
- 2.Qxc6#
- 1...b3
- 2.Qc4#
- 1...g5
- 2.f5#
- 1...Bg7+
- 1.Re3!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(j);XP(G)::S(J),XR(j)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- B(h);OGATE,XS(J)::QAR2(A),XB(h)
- B(h);OGATE::PXB(h)=Q
- B(k);OGATE,P_SPINB(k),XP(E)::R1(B),XB(k)
- B(k);OGATE::R(B)+P(E),XB(k)
- B(k);CHECK,N_GUARD::S(J),XB(k)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(i);N_GUARD::QAR2(A),XS(i)
- S(i);CHECK,N_GUARD::QAB1(A),XS(i)
- P(c);OGATE::QAB(A)
- P(g);N_GUARD::P(C)
- Tries
- Try
- R(B);
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- S(i);CHECK,N_GUARD::QAB1(A),XS(i)
- R(j);XP(G)::S(J),XR(j)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- B(h);OGATE,XS(J)::QAR2(A),XB(h)
- B(k);OGATE,P_SPINB(k),XP(E)::R1(B),XB(k)
- B(h);OGATE::PXB(h)=Q
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(i);N_GUARD::QAR2(A),XS(i)
- P(c);OGATE::QAB(A)
- P(g);N_GUARD::P(C)
- Refutation
- B(k);
- Try
- R(B);
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- S(i);CHECK,N_GUARD::QAB1(A),XS(i)
- R(j);XP(G)::S(J),XR(j)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- B(h);OGATE,XS(J)::QAR2(A),XB(h)
- B(k);OGATE,P_SPINB(k),XP(E)::R1(B),XB(k)
- S(a);N_GUARD,XR(B)::QAB(A)
- B(h);OGATE::PXB(h)=Q
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(i);N_GUARD::QAR2(A),XS(i)
- P(c);OGATE::QAB(A)
- P(g);N_GUARD::P(C)
- Refutation
- B(k);
- Try
- R(B);
- Threat
- R1(B)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- S(i);CHECK,N_GUARD::QAB1(A),XS(i)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- Refutation
- B(k);XP(E)
- Try
- Q(A);XP(b)
- Threat
- QAB(A)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- R(j);XP(G)::S(J),XR(j)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- Refutation
- S(i);CHECK
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- S(i);CHECK,N_GUARD::QAB1(A),XS(i)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- Refutation
- P(e);XQ(A)
- Try
- Q(A);XP(d)
- Threat
- QAB1(A)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- Refutation
- S(i);CHECK
- Try
- P(G);XS(i)
- Threat
- DUALS(3)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- R(j);N_GUARD::QAR2(A),XR(j)
- R(j);N_GUARD::S(J),XR(j)
- Refutation
- R(j);P_PINS(J),XB(I)
- Try
- P(G);XS(i)
- Threat
- QAB1(A)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- B(h);OGATE,XS(J)::QAR2(A),XB(h)
- R(j);N_GUARD::QAR2(A),XR(j)
- R(j);N_GUARD::S(J),XR(j)
- Refutation
- R(j);P_PINS(J),XB(I)
- Try
- P(G);XS(i)
- Threat
- QAB1(A)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- B(h);OGATE,XS(J)::QAR2(A),XB(h)
- R(j);N_GUARD::QAR2(A),XR(j)
- R(j);N_GUARD::S(J),XR(j)
- Refutation
- R(j);P_PINS(J),XB(I)
- Try
- P(G);XS(i)
- Threat
- QAB1(A)
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- B(h);OGATE,XS(J)::QAR2(A),XB(h)
- R(j);N_GUARD::QAR2(A),XR(j)
- R(j);N_GUARD::S(J),XR(j)
- Refutation
- R(j);P_PINS(J),XB(I)
- Try
- Actual
- R(B);
- Vars
- B(k);CHECK,N_GUARD::S(J),XB(k)
- S(i);CHECK,N_GUARD::QAB1(A),XS(i)
- R(j);XP(G)::S(J),XR(j)
- R(j);OGATE,P_PINS(J),XB(I)::PXR(j)=S
- B(h);OGATE,XS(J)::QAR2(A),XB(h)
- B(k);OGATE,P_SPINB(k),XP(E)::R1(B),XB(k)
- B(k);OGATE::R(B)+P(E),XB(k)
- B(h);OGATE::PXB(h)=Q
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(i);N_GUARD::QAR2(A),XS(i)
- P(c);OGATE::QAB(A)
- P(g);N_GUARD::P(C)
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).