MESON Chess Problem Database
Problem Display
PID: 38145 (1n4B1/6p1/1NR5/2P1kp2/1p1p1pP1/r2Q3K/b1P1PN2/4R3 w - - 0 1)
Keirans, Arturs
Shakhmaty v SSSR, 1948
#2
11 + 9
| 3105 | FIDE Album (1945-1955) | 1964 |
SOLUTION
- SOUND
- Sets
- 1...Rb3
- 2.Sc4#
- 2.Re6#
- 1...Rxd3+
- 2.exd3#
- 1...Ra4
- 2.Qxf5#
- 1...Ra5
- 2.Qxf5#
- 1...Ra6
- 2.Qxf5#
- 1...Ra7
- 2.Qxf5#
- 1...Ra8
- 2.Qxf5#
- 1...Bb1
- 2.Sc4#
- 2.Re6#
- 1...Bb3
- 2.Qxf5#
- 1...Bc4
- 2.Sxc4#
- 1...Be6
- 2.Rxe6#
- 1...Sa6
- 2.Sd7#
- 1...Sxc6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...b3
- 2.Sc4#
- 2.Re6#
- 2.Qxf5#
- 1...f3
- 2.Qxf5#
- 1...fxg4+
- 2.Sxg4#
- 1...Rb3
- Tries
- 1.Kh2?
- threat
- 2.Qxf5#
- 1...Rxd3
- 2.exd3#
- 1...fxg4
- 2.Sxg4#
- 2.Qe4#
- 1...Be6
- 2.Rxe6#
- 1...g6!
- threat
- 1.Bxa2?
- threat
- 2.Re6#
- 1...Rxd3+
- 2.exd3#
- 1...fxg4+
- 2.Sxg4#
- 1...Rxa2
- 2.Qxf5#
- 1...Sxc6
- 2.Sd7#
- 1...f3
- 2.Qxf5#
- 1...b3
- 2.Qxf5#
- 1...Rb3!
- threat
- 1.Bb3?
- threat
- 2.Re6#
- 2.Qxf5#
- 1...fxg4+
- 2.Sxg4#
- 1...Bxb3
- 2.Qxf5#
- 1...Sxc6
- 2.Sd7#
- 2.Qxf5#
- 1...f3
- 2.Qxf5#
- 1...g6
- 2.Re6#
- 1...Rxb3!
- threat
- 1.Bc4?
- threat
- 2.Re6#
- 1...Rxd3+
- 2.exd3#
- 1...fxg4+
- 2.Sxg4#
- 1...Sxc6
- 2.Sd7#
- 1...f3
- 2.Qxf5#
- 1...Bxc4!
- threat
- 1.c3?
- threat
- 2.Qxf5#
- 2.Qxd4#
- 2.cxd4#
- 1...fxg4+
- 2.Sxg4#
- 1...Sxc6
- 2.Sd7#
- 2.Qxf5#
- 1...bxc3
- 2.Qxf5#
- 1...dxc3
- 2.Qd6#
- 1...Be6
- 2.Rxe6#
- 2.Qxd4#
- 1...f3
- 2.Qxf5#
- 2.Qxd4#
- 1...g6
- 2.Qxd4#
- 2.cxd4#
- 1...Bb1
- 2.Sc4#
- 2.Re6#
- 2.Qxd4#
- 2.cxd4#
- 1...Rxc3!
- threat
- 1.e3?
- threat
- 2.Qxf5#
- 2.Qxd4#
- 2.exd4#
- 1...fxg4+
- 2.Sxg4#
- 1...Sxc6
- 2.Sd7#
- 2.Qxf5#
- 1...dxe3
- 2.Qd6#
- 1...fxe3
- 2.Qxf5#
- 1...Be6
- 2.Rxe6#
- 2.Qxd4#
- 1...g6
- 2.Qxd4#
- 2.exd4#
- 1...f3
- 2.Qxf5#
- 2.Qxd4#
- 1...Rxd3!
- threat
- 1.e4?
- threat
- 2.exf5#
- 1...Rxd3+
- 2.Sxd3#
- 1...fxg4+
- 2.Sxg4#
- 1...Sxc6
- 2.Sd7#
- 1...fxe4
- 2.Rxe4#
- 1...dxe4 ep
- 2.Qd6#
- 1...fxe4 ep
- 2.Qxf5#
- 1...Be6
- 2.Rxe6#
- 1...Bd5
- 2.exd5#
- 1...f3!
- threat
- 1.gxf5?
- threat
- 2.Sg4#
- 1...f3
- 2.Qe4#
- 1...Rxd3+!
- threat
- 1.Kh2?
- Keys
- 1.c4!
- threat
- 2.Re6#
- 1...Rxd3+
- 2.exd3#
- 1...fxg4+
- 2.Sxg4#
- 1...Bxc4
- 2.Sxc4#
- 1...Sxc6
- 2.Sd7#
- 1...bxc4 ep
- 2.Qxf5#
- 1...dxc4 ep
- 2.Qd6#
- 1...f3
- 2.Qxf5#
- threat
- 1.c4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- R(b);CHECK,OGATE,XQ(E)::R(A)+P(C),XR(b)
- R(b);N_PINQ(E)::QAR1(E),XP(g)
- B(a);N_PINQ(E)::QAR1(E),XP(g)
- B(a);N_GUARD::S(I),XB(a)
- B(a);N_GUARD::R1(J),XB(a)
- S(i);N_GUARD::S(I)
- S(i);N_GUARD,XR(J)::S(I)
- S(i);N_GUARD::S(I),XS(i)
- P(e);N_PINQ(E)::QAR1(E),XP(g)
- P(g);CHECK,XP(G)::S(D),XP(g)
- Tries
- Try
- K(F);N_SPINQ(E),P-FLIGHT
- Threat
- QAR1(E),XP(g)
- Vars
- R(b);OGATE,XQ(E)::R(A)+P(C),XR(b)
- B(a);N_GUARD::R1(J),XB(a)
- Refutation
- P(h);
- Try
- B(K);XB(a)
- Threat
- R1(J)
- Vars
- R(b);CHECK,OGATE,XQ(E)::R(A)+P(C),XR(b)
- P(g);CHECK,XP(G)::S(D),XP(g)
- R(b);N_PINQ(E),XB(K)::QAR1(E),XP(g)
- S(i);N_GUARD,XR(J)::S(I)
- P(e);N_PINQ(E)::QAR1(E),XP(g)
- P(c);N_PINQ(E)::QAR1(E),XP(g)
- Refutation
- R(b);
- Try
- B(K);N_SPINQ(E)
- Threat
- DUALS(2)
- Vars
- P(g);CHECK,XP(G)::S(D),XP(g)
- B(a);XB(K)::QAR1(E),XP(g)
- P(e);::QAR1(E),XP(g)
- P(h);::R1(J)
- Refutation
- R(b);P_PINQ(E),XB(K)
- Try
- B(K);
- Threat
- R1(J)
- Vars
- R(b);CHECK,OGATE,XQ(E)::R(A)+P(C),XR(b)
- P(g);CHECK,XP(G)::S(D),XP(g)
- S(i);N_GUARD,XR(J)::S(I)
- P(e);N_PINQ(E)::QAR1(E),XP(g)
- Refutation
- B(a);XB(K)
- Try
- P(B);N_SPINQ(E)
- Threat
- DUALS(3)
- Vars
- P(g);CHECK,XP(G)::S(D),XP(g)
- P(c);XP(B)::QAR1(E),XP(g)
- P(d);OGATE,XP(B)::QAB1(E)
- Refutation
- R(b);P_PINQ(E),XP(B)
- Try
- P(C);N_SPINQ(E)
- Threat
- DUALS(3)
- Vars
- P(g);CHECK,XP(G)::S(D),XP(g)
- P(d);OGATE,P_SPINP(d),XP(C)::QAB1(E)
- P(e);P_SPINP(e),XP(C)::QAR1(E),XP(g)
- Refutation
- R(b);P_PINP(C),XQ(E)
- Try
- P(C);
- Threat
- R(A)+P(C),XP(g)
- Vars
- R(b);CHECK,XQ(E)::S(D),XR(b)
- P(g);CHECK,XP(G)::S(D),XP(g)
- S(i);N_GUARD,XR(J)::S(I)
- P(g);OGATE,P_SPINP(g),XP(C)::R1(A),XP(g)
- P(d);EP,N_PINQ(E),P_SPINP(d),XP(C)::QAB1(E)
- P(e);EP,N_PINQ(E),P_SPINP(e),XP(C)::QAR1(E),XP(g)
- B(a);N_GUARD::R1(J),XB(a)
- B(a);OGATE::R(A)+P(C),XB(a)
- Refutation
- P(e);N_PINQ(E)
- Try
- P(G);XP(g)
- Threat
- S(D)
- Vars
- P(e);N_PINQ(E)::QAR1(E)
- Refutation
- R(b);CHECK,XQ(E)
- Try
- Actual
- P(B);
- Threat
- R1(J)
- Vars
- R(b);CHECK,OGATE,XQ(E)::R(A)+P(C),XR(b)
- P(g);CHECK,XP(G)::S(D),XP(g)
- B(a);XP(B)::S(I),XB(a)
- S(i);N_GUARD,XR(J)::S(I)
- P(c);EP,N_PINQ(E),XP(B)::QAR1(E),XP(g)
- P(d);EP,N_PINQ(E),XP(B)::QAB1(E)
- P(e);N_PINQ(E)::QAR1(E),XP(g)
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).