MESON Chess Problem Database
Problem Display
PID: 108943 (2B5/7K/6P1/4p1Np/4R1qk/3R2p1/3Q4/8 w - - 0 1)
Meyerhofer, William
Checkmate, 1903
#2
7 + 5
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qf4
- Tries
- 1.Kg7?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Kg8?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Kh8?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Bxg4?
- threat
- 2.Sf3#
- 2.Bd1#
- 2.Be2#
- 2.Bf3#
- 2.Bh3#
- 2.Bf5#
- 2.Be6#
- 2.Bd7#
- 2.Bc8#
- 1...g2
- 2.Bd1#
- 2.Be2#
- 2.Bh3#
- 2.Bf5#
- 2.Be6#
- 2.Bd7#
- 2.Bc8#
- 2.Rh3#
- 1...hxg4!
- threat
- 1.Bf5?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Be6?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Bd7?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Ra3?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Rb3?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Rc3?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Rxg3?
- threat
- 2.Rh3#
- 1...Qf4
- 2.Qh2#
- 1...Kxg3!
- threat
- 1.Ra4?
- 1...Qxa4
- 2.Sf3#
- 1...Qf4
- 2.Sf3#
- 1...Qb4
- 2.Sf3#
- 1...Qc4
- 2.Sf3#
- 1...Qd4
- 2.Sf3#
- 1...Qe4
- 2.Sf3#
- 2.Rxe4#
- 1...g2
- 2.Rh3#
- 1...e4!
- 1...Qxa4
- 1.Rb4?
- 1...Qxb4
- 2.Sf3#
- 1...Qf4
- 2.Sf3#
- 1...Qc4
- 2.Sf3#
- 1...Qd4
- 2.Sf3#
- 1...Qe4
- 2.Sf3#
- 2.Rxe4#
- 1...g2
- 2.Rh3#
- 1...e4!
- 1...Qxb4
- 1.Rc4?
- 1...Qxc4
- 2.Sf3#
- 1...Qf4
- 2.Sf3#
- 1...Qd4
- 2.Sf3#
- 1...Qe4
- 2.Sf3#
- 2.Rxe4#
- 1...g2
- 2.Rh3#
- 1...e4!
- 1...Qxc4
- 1.Qc1?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4!
- 1...Qf4
- 1.Qe1?
- 1...Qxe4
- 2.Qxg3#
- 1...Qf4
- 2.Sf3#
- 2.Qxg3#
- 1...Kxg5!
- 1...Qxe4
- 1.Qe3?
- 1...Qxe4
- 2.Qxg3#
- 1...Qf4
- 2.Sf3#
- 2.Qxg3#
- 1...g2!
- 1...Qxe4
- 1.Qb4?
- 1...Kxg5
- 2.Qe7#
- 1...Qxe4
- 2.Sf3#
- 1...Qf4
- 2.Sf3#
- 1...g2!
- 1...Kxg5
- 1.Qf4?
- 1...Qxf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...exf4!
- 1...Qxf4
- 1.Qg2?
- threat
- 2.Sf3#
- 1...Qxe4
- 2.Qxg3#
- 1...Kxg5!
- threat
- 1.g7?
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Qxe4+!
- 1...Qf4
- 1.Kg7?
- Keys
- 1.Rde3!
- 1...Kxg5
- 2.Qd8#
- 1...Qxe4
- 2.Rxe4#
- 1...Qf4
- 2.Sf3#
- 1...g2
- 2.Rh3#
- 1...Kxg5
- 1.Rde3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Tries
- Try
- K(F);P-FLIGHT
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),XR(C)
- Try
- K(F);S_FLIGHT
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),XR(C)
- Try
- K(F);P-FLIGHT
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),XR(C)
- Try
- B(G);XQ(b)
- Threat
- DUALS(9)
- Refutation
- P(e);P_SPINP(e),XB(G)
- Try
- B(G);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),XR(C)
- Try
- B(G);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)
- Try
- B(G);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)
- Try
- R(B);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)
- Try
- R(B);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)
- Try
- R(B);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)
- Try
- R(B);XP(a)
- Threat
- R1(B)
- Vars
- Q(b);::QAR2(A)
- Refutation
- K(c);N_SPINQ(b),S_FLIGHT,XR(B)
- Try
- R(C);
- Vars
- Q(b);N_SPINQ(b),SBLOCK,XR(C)::S(D)
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- P(d);N_SPINQ(b)
- Try
- R(C);
- Vars
- Q(b);N_SPINQ(b),XR(C)::S(D)
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- P(d);N_SPINQ(b)
- Try
- R(C);
- Vars
- Q(b);N_SPINQ(b),XR(C)::S(D)
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- P(d);N_SPINQ(b)
- Try
- Q(A);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)
- Try
- Q(A);P_PINP(a)
- Vars
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)::QAB1(A),XP(a)
- Refutation
- K(c);N_SPINP(a),N_SPINQ(b),S_FLIGHT,XS(D)
- Try
- Q(A);
- Vars
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)::QAB1(A),XP(a)
- Refutation
- P(a);
- Try
- Q(A);
- Vars
- K(c);N_SPINQ(b),OGATEB,S_FLIGHT,XS(D)::QAB(A)
- Q(b);P_PINP(E),XR(C)::S(D)
- Q(b);::S(D)
- Refutation
- P(a);
- Try
- Q(A);
- Vars
- Q(b);XQ(A)::S(D)
- P(a);OGATE::R1(B)
- Refutation
- P(d);N_SPINQ(b),XQ(A)
- Try
- Q(A);
- Threat
- S(D)
- Vars
- Q(b);N_SPINQ(b),P_PINP(E),XR(C)::QAB1(A),XP(a)
- Refutation
- K(c);N_SPINQ(b),S_FLIGHT,XS(D)
- Try
- P(E);
- Vars
- Q(b);::S(D)
- P(a);OGATE::R1(B)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XR(C)
- Try
- Actual
- R(B);
- Vars
- K(c);N_SPINQ(b),OGATEB,S_FLIGHT,XS(D)::QAB(A)
- Q(b);N_SPINQ(b),OGATE,P_PINP(E),XR(C)::R(B),XQ(b)
- Q(b);::S(D)
- P(a);OGATE::R1(B)
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).