MESON Chess Problem Database
Problem Display
PID: 196794 (1N6/1pR1PB2/1Pbkr3/4p1QK/1pR2BpP/1P4P1/8/8 w - - 0 1)
Anonymous
Boston Evening Transcript, 1919
#2
12 + 7
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Qxe5#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 1...Rg6
- 2.Bxe5#
- 2.Qxe5#
- 2.Qxg6#
- 1...Rh6+
- 2.Qxh6#
- 1...Rxe7
- 2.Qxe7#
- 1...Bh1
- 2.Rd7#
- 1...Bg2
- 2.Rd7#
- 1...Bf3
- 2.Rd7#
- 1...Ba4
- 2.Rd4#
- 1...Be4
- 2.Rd7#
- 1...Bb5
- 2.Rd4#
- 1...Bd5
- 2.Rd7#
- 1...Bd7
- 2.Rd4#
- 2.Rxd7#
- 1...Be8
- 2.Rd4#
- 1...exf4
- 2.Qc5#
- 1...Kd5
- Tries
- 1.Kxg4?
- 1...Kd5
- 2.Qxe5#
- 1...Rxe7
- 2.Qxe7#
- 1...exf4
- 2.Qc5#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 1...Rg6
- 2.Bxe5#
- 2.Qxg6#
- 1...Rh6
- 2.Bxe5#
- 2.Qxh6#
- 2.Qxe5#
- 1...Bh1
- 2.Rd7#
- 1...Bg2
- 2.Rd7#
- 1...Ba4
- 2.Rd4#
- 1...Be4
- 2.Rd7#
- 1...Bb5
- 2.Rd4#
- 1...Bd5
- 2.Rd7#
- 1...Bd7
- 2.Rd4#
- 2.Rxd7#
- 1...Be8
- 2.Rd4#
- 1...Bf3+!
- 1...Kd5
- 1.Sxc6?
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Rd7#
- 2.Qxe5#
- 1...Rxe7
- 2.Qxe7#
- 1...exf4
- 2.Rd4#
- 2.Qc5#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 2.e8S#
- 1...Rg6
- 2.Bxe5#
- 2.Qxe5#
- 2.Qxg6#
- 2.e8S#
- 1...bxc6!
- 1...Rh6+
- 1.Bxe5+?
- 1...Kd5
- 2.Bf4#
- 1...Rxe5!
- 1...Kd5
- 1.Bg8?
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Qxe5#
- 1...Rxe7
- 2.Qxe7#
- 1...exf4
- 2.Qc5#
- 1...Ba4
- 2.Rd4#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 1...Rg6
- 2.Bxe5#
- 2.Qxe5#
- 2.Qxg6#
- 1...Bh1
- 2.Rd7#
- 1...Bg2
- 2.Rd7#
- 1...Bf3
- 2.Rd7#
- 1...Be4
- 2.Rd7#
- 1...Bb5
- 2.Rd4#
- 1...Bd5
- 2.Rd7#
- 1...Bd7
- 2.Rd4#
- 2.Rxd7#
- 1...Be8+!
- 1...Rh6+
- 1.Rc1?
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Qxe5#
- 1...Rxe7
- 2.Qxe7#
- 1...exf4
- 2.Qc5#
- 1...Ba4
- 2.Rd1#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 1...Rg6
- 2.Bxe5#
- 2.Qxe5#
- 2.Qxg6#
- 1...Bh1
- 2.Rd7#
- 1...Bg2
- 2.Rd7#
- 1...Bf3
- 2.Rd7#
- 1...Be4
- 2.Rd7#
- 1...Bd5
- 2.Rd7#
- 1...Bd7
- 2.Rd1#
- 2.Rxd7#
- 1...Be8
- 2.Rd1#
- 1...Bb5!
- 1...Rh6+
- 1.Rc2?
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Qxe5#
- 1...Rxe7
- 2.Qxe7#
- 1...exf4
- 2.Qc5#
- 1...Ba4
- 2.Rd2#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 1...Rg6
- 2.Bxe5#
- 2.Qxe5#
- 2.Qxg6#
- 1...Bh1
- 2.Rd7#
- 1...Bg2
- 2.Rd7#
- 1...Bf3
- 2.Rd7#
- 1...Be4
- 2.Rd7#
- 1...Bd5
- 2.Rd7#
- 1...Bd7
- 2.Rd2#
- 2.Rxd7#
- 1...Be8
- 2.Rd2#
- 1...Bb5!
- 1...Rh6+
- 1.R4xc6+?
- 1...Kd5
- 2.Qxe5#
- 1...bxc6!
- 1...Kd5
- 1.R7xc6+?
- 1...Kd5
- 2.Bxe6#
- 2.Qxe5#
- 1...bxc6!
- 1...Kd5
- 1.Qf6?
- threat
- 2.Qxe6#
- 1...Kd5
- 2.Qxe5#
- 2.Qxe6#
- 1...Bd5
- 2.Bxe5#
- 2.Rd7#
- 2.e8S#
- 1...Bd7
- 2.Rd4#
- 2.Rxd7#
- 1...Rxf6!
- threat
- 1.Qh6?
- threat
- 2.Qxe6#
- 1...Kd5
- 2.Qxe6#
- 1...Bd7
- 2.Rxd7#
- 1...Rf6
- 2.Qxf6#
- 1...Rg6
- 2.Qxg6#
- 1...Bd5
- 2.Rd7#
- 2.e8S#
- 1...Rxh6+!
- threat
- 1.Qg6?
- threat
- 2.Qxe6#
- 1...Kd5
- 2.Qd3#
- 2.Qxe6#
- 1...Bd7
- 2.Rxd7#
- 1...Rf6
- 2.Qxf6#
- 1...Bd5
- 2.Rd7#
- 2.e8S#
- 1...Rxg6!
- threat
- 1.e8Q?
- threat
- 2.Qxe6#
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Qxe5#
- 2.Qxe6#
- 1...Bxe8
- 2.Rd4#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qgxe5#
- 2.Qexe5#
- 2.Qe7#
- 2.Qf8#
- 1...Rg6
- 2.Bxe5#
- 2.Qge7#
- 2.Qgxe5#
- 2.Qxg6#
- 2.Qexe5#
- 2.Qee7#
- 2.Qf8#
- 1...Re7
- 2.Qgxe7#
- 2.Qexe7#
- 1...Bd5
- 2.Rd7#
- 2.Qgd8#
- 2.Qd7#
- 2.Qed8#
- 1...Bd7
- 2.Rd4#
- 2.Rxd7#
- 2.Qxd7#
- 1...Rxe8!
- threat
- 1.e8S+?
- 1...Kd5
- 2.Qxe5#
- 1...Bxe8
- 2.Rd4#
- 1...Rxe8!
- 1...Kd5
- 1.e8B?
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Qxe5#
- 1...Bxe8
- 2.Rd4#
- 1...exf4
- 2.Qc5#
- 1...Bb5
- 2.Rd4#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 1...Rg6
- 2.Bxe5#
- 2.Qe7#
- 2.Qxe5#
- 2.Qxg6#
- 1...Re7
- 2.Qxe7#
- 1...Bh1
- 2.Rd7#
- 2.Qd8#
- 1...Bg2
- 2.Rd7#
- 2.Qd8#
- 1...Bf3
- 2.Rd7#
- 2.Qd8#
- 1...Ba4
- 2.Rd4#
- 1...Be4
- 2.Rd7#
- 2.Qd8#
- 1...Bd5
- 2.Rd7#
- 2.Qd8#
- 1...Bd7
- 2.Rd4#
- 2.Rxd7#
- 1...Rxe8!
- 1...Rh6+
- 1.e8R?
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Qxe5#
- 1...Bxe8
- 2.Rd4#
- 1...exf4
- 2.Rxe6#
- 2.Qc5#
- 1...Bb5
- 2.Rd4#
- 1...Rf6
- 2.Bxe5#
- 2.Qxf6#
- 2.Qxe5#
- 1...Rg6
- 2.Bxe5#
- 2.Qe7#
- 2.Qxe5#
- 2.Qxg6#
- 1...Re7
- 2.Qxe7#
- 1...Bh1
- 2.Rd7#
- 2.Rd8#
- 2.Qd8#
- 1...Bg2
- 2.Rd7#
- 2.Rd8#
- 2.Qd8#
- 1...Bf3
- 2.Rd7#
- 2.Rd8#
- 2.Qd8#
- 1...Ba4
- 2.Rd4#
- 1...Be4
- 2.Rd7#
- 2.Rd8#
- 2.Qd8#
- 1...Bd5
- 2.Rd7#
- 2.Rd8#
- 2.Qd8#
- 1...Bd7
- 2.Rd4#
- 2.Rxd7#
- 1...Rxe8!
- 1...Rh6+
- 1.Kxg4?
- Keys
- 1.Bc1!
- 1...Rh6+
- 2.Qxh6#
- 1...Kd5
- 2.Qd2#
- 1...Rxe7
- 2.Qxe7#
- 1...Rf6
- 2.Qxf6#
- 1...Rg6
- 2.Qxg6#
- 1...Bh1
- 2.Rd7#
- 1...Bg2
- 2.Rd7#
- 1...Bf3
- 2.Rd7#
- 1...Ba4
- 2.Qd2#
- 1...Be4
- 2.Rd7#
- 1...Bb5
- 2.Qd2#
- 1...Bd5
- 2.Rd7#
- 1...Bd7
- 2.Rxd7#
- 1...Be8
- 2.Qd2#
- 1...e4
- 2.Qc5#
- 1...Rh6+
- 1.Bc1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- R(f);OGATE,XP(J)::QAB1(F),XR(f)
- B(d);N_GUARD::R1(I)
- B(d);N_GUARD::R(C)
- B(d);N_GUARD,SBLOCK::R1(I)
- B(d);N_GUARD,P_PINB(K)::R(C)
- P(c);N_SPINP(c),OGATE,XB(D)::QAB1(F)
- Tries
- Try
- K(G);S_FLIGHT,XP(b)
- Vars
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- R(f);OGATE,XP(J)::QAB1(F),XR(f)
- P(c);N_SPINP(c),OGATE,XB(D)::QAB1(F)
- B(d);N_GUARD::R1(I)
- B(d);N_GUARD::R(C)
- B(d);N_GUARD,SBLOCK::R1(I)
- Refutation
- B(d);CHECK
- Try
- S(L);XB(d)
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- R(f);OGATE,XP(J)::QAB1(F),XR(f)
- Refutation
- P(g);XS(L)
- Try
- B(D);CHECK,XP(c)
- Vars
- K(e);P-FLIGHT,P_SPINR(f)::QAR(F)+B(D)
- Refutation
- R(f);P_PINQ(F),XB(D)
- Try
- B(K);
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- R(f);OGATE,XP(J)::QAB1(F),XR(f)
- P(c);N_SPINP(c),OGATE,XB(D)::QAB1(F)
- B(d);N_GUARD::R(C)
- B(d);N_GUARD::R1(I)
- B(d);N_GUARD,SBLOCK::R1(I)
- Refutation
- B(d);CHECK
- Try
- R(C);
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- R(f);OGATE,XP(J)::QAB1(F),XR(f)
- P(c);N_SPINP(c),OGATE,XB(D)::QAB1(F)
- B(d);N_GUARD::R(C)
- B(d);N_GUARD::R1(I)
- B(d);N_GUARD,SBLOCK::R1(I)
- B(d);N_GUARD,P_PINB(K)::R(C)
- Refutation
- B(d);
- Try
- R(C);
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- R(f);OGATE,XP(J)::QAB1(F),XR(f)
- P(c);N_SPINP(c),OGATE,XB(D)::QAB1(F)
- B(d);N_GUARD::R(C)
- B(d);N_GUARD::R1(I)
- B(d);N_GUARD,SBLOCK::R1(I)
- B(d);N_GUARD,P_PINB(K)::R(C)
- Refutation
- B(d);
- Try
- R(C);CHECK,XB(d)
- Vars
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- Refutation
- P(g);XR(C)
- Try
- R(I);CHECK,XB(d)
- Refutation
- P(g);XR(I)
- Try
- Q(F);P_PINR(f)
- Threat
- QAR1(F),XR(f)
- Refutation
- R(f);N_SPINR(f),XQ(F)
- Try
- Q(F);P_PINR(f)
- Threat
- QAR1(F),XR(f)
- Vars
- K(e);N_SPINP(c),P-FLIGHT::QAB1(F),XR(f)
- B(d);N_GUARD::R1(I),XB(d)
- R(f);OGATEB::QAR2(F),XR(f)
- R(f);OGATEB::QAR(F),XR(f)
- Refutation
- R(f);CHECK,N_SPINR(f),XQ(F)
- Try
- Q(F);P_PINR(f)
- Threat
- QAR1(F),XR(f)
- Vars
- B(d);N_GUARD::R1(I),XB(d)
- R(f);OGATEB::QAR2(F),XR(f)
- Refutation
- R(f);N_SPINR(f),XQ(F)
- Try
- P(J);
- Threat
- QAR1(J),XR(f)
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- B(d);N_GUARD,P_PINB(K),XQ(J)::R(C)
- Refutation
- R(f);XQ(J)
- Try
- P(J);CHECK
- Vars
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- B(d);P_PINB(K),XS(J)::R(C)
- Refutation
- R(f);XS(J)
- Try
- P(J);
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- B(d);N_GUARD,P_PINB(K),XB(J)::R(C)
- P(c);N_SPINP(c),OGATE,XB(D)::QAB1(F)
- B(d);N_GUARD::R(C)
- R(f);N_GUARD::QAB1(F),XR(f)
- Refutation
- R(f);XB(J)
- Try
- P(J);
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- K(e);P-FLIGHT,P_SPINR(f)::QAR1(F),XP(c)
- B(d);N_GUARD,P_PINB(K),XR(J)::R(C)
- B(d);N_GUARD::R(C)
- R(f);N_GUARD::QAB1(F),XR(f)
- Refutation
- R(f);XR(J)
- Try
- Actual
- B(D);N_PINP(c)
- Vars
- R(f);CHECK,OGATEB::QAR(F),XR(f)
- K(e);P-FLIGHT,P_SPINP(c),P_SPINR(f)::QAR(F)
- R(f);OGATE,XP(J)::QAB1(F),XR(f)
- R(f);OGATEB::QAR2(F),XR(f)
- R(f);OGATEB::QAR(F),XR(f)
- B(d);N_GUARD::R1(I)
- B(d);N_GUARD::QAR(F)
- B(d);N_GUARD,SBLOCK::R1(I)
- B(d);N_GUARD::R1(I),XB(d)
- B(d);N_GUARD,P_PINB(K)::QAR(F)
- P(c);OGATE::QAB1(F)
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).