MESON Chess Problem Database
Problem Display
PID: 7535 (3NrBNb/3Bp1n1/2P5/2pkPpKP/3p2p1/3P1Pp1/2PPQ1P1/4R3 w - f5 0 1)
Strydom, Jan
1st Prize, Die Schwalbe 175. TT, 1991
#2
15 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...Se6+
- 2.Bxe6#
- 1...gxf3
- 2.Qxf3#
- 1...f4
- 2.Qe4#
- 1...e6
- 2.Sf6#
- 1...Rxd8
- Tries
- 1.Kh4?
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...gxf3
- 2.Qxf3#
- 1...Se6
- 2.Bxe6#
- 1...f4
- 2.Qe4#
- 1...e6
- 2.Sf6#
- 1...c4!
- 1...Rxd8
- 1.Kg6?
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...gxf3
- 2.Qxf3#
- 1...Se6
- 2.Bxe6#
- 1...f4
- 2.Qe4#
- 1...e6
- 2.Sf6#
- 1...c4!
- 1...Rxd8
- 1.Kh6?
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...gxf3
- 2.Qxf3#
- 1...Se6
- 2.Bxe6#
- 1...f4
- 2.Qe4#
- 1...e6
- 2.Sf6#
- 1...c4!
- 1...Rxd8
- 1.Se6?
- threat
- 2.Sf4#
- 2.Sc7#
- 1...Sxh5
- 2.Sc7#
- 1...Rc8
- 2.Sf4#
- 2.Sxe7#
- 1...c4
- 2.dxc4#
- 1...f4
- 2.Sxf4#
- 2.Sc7#
- 2.Qe4#
- 1...Sxe6+!
- threat
- 1.Bxf5?
- threat
- 2.Qe4#
- 1...Se6+
- 2.Bxe6#
- 1...c4!
- threat
- 1.Bc8?
- 1...Se6+
- 2.Bxe6#
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...gxf3
- 2.Qxf3#
- 1...f4
- 2.Qe4#
- 1...e6
- 2.Sf6#
- 1...c4!
- 1...Se6+
- 1.Bxg7?
- threat
- 2.Be6#
- 1...Rxd8
- 2.Sxe7#
- 1...e6
- 2.Sf6#
- 1...c4!
- threat
- 1.Ra1?
- 1...Se6+
- 2.Bxe6#
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...c4
- 2.Ra5#
- 1...f4
- 2.Qe4#
- 1...e6
- 2.Sf6#
- 1...gxf3!
- 1...Se6+
- 1.Rb1?
- 1...Se6+
- 2.Bxe6#
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...c4
- 2.Rb5#
- 1...f4
- 2.Qe4#
- 1...e6
- 2.Sf6#
- 1...gxf3!
- 1...Se6+
- 1.fxg4?
- threat
- 2.Qf3#
- 1...Se6+
- 2.Bxe6#
- 1...fxg4
- 2.Qe4#
- 1...c4!
- threat
- 1.f4?
- 1...Se6+
- 2.Bxe6#
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...Sxh5
- 2.Be6#
- 1...e6
- 2.Sf6#
- 1...c4!
- 1...Se6+
- 1.e6?
- threat
- 2.Qe5#
- 1...Sxe6+
- 2.Qxe6#
- 1...Kd6
- 2.Qe5#
- 1...Sxh5!
- threat
- 1.h6?
- 1...Se6+
- 2.Bxe6#
- 1...Rxd8
- 2.Sxe7#
- 1...Rxf8
- 2.Sxe7#
- 1...gxf3
- 2.Qxf3#
- 1...f4
- 2.Qe4#
- 1...Sh5
- 2.Be6#
- 1...e6
- 2.Sf6#
- 1...c4!
- 1...Se6+
- 1.c7?
- threat
- 2.Bc6#
- 1...Se6+
- 2.Bxe6#
- 1...Rxd8
- 2.Sxe7#
- 1...c4!
- threat
- 1.Kh4?
- Keys
- 1.exf5 ep!
- threat
- 2.Qe5#
- 1...Se6+
- 2.Qxe6#
- 1...exf6+
- 2.Sxf6#
- 1...Kd6
- 2.Qe5#
- 1...e5
- 2.Qe4#
- threat
- 1.exf5 ep!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- S(h);CHECK,N_GUARD::B(L),XS(h)
- P(c);OGATE,XP(G)::QAB(D),XP(c)
- P(f);N_GUARD::QAB1(D)
- P(g);N_GUARD::S(O)
- Tries
- Try
- K(I);S_FLIGHT
- Vars
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- P(c);OGATE,XP(G)::QAB(D),XP(c)
- S(h);N_GUARD::B(L),XS(h)
- P(f);N_GUARD::QAB1(D)
- P(g);N_GUARD::S(O)
- Refutation
- P(d);
- Try
- K(I);P-FLIGHT
- Vars
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- P(c);OGATE,XP(G)::QAB(D),XP(c)
- S(h);N_GUARD::B(L),XS(h)
- P(f);N_GUARD::QAB1(D)
- P(g);N_GUARD::S(O)
- Refutation
- P(d);
- Try
- K(I);S_FLIGHT
- Vars
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- P(c);OGATE,XP(G)::QAB(D),XP(c)
- S(h);N_GUARD::B(L),XS(h)
- P(f);N_GUARD::QAB1(D)
- P(g);N_GUARD::S(O)
- Refutation
- P(d);
- Try
- S(M);
- Threat
- DUALS(2)
- Vars
- S(h);XP(J)::S(M)
- P(d);OGATE::P(F),XP(d)
- Refutation
- S(h);CHECK,XS(M)
- Try
- B(L);XP(f)
- Threat
- QAB1(D)
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- Refutation
- P(d);
- Try
- B(L);
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- P(c);OGATE,XP(G)::QAB(D),XP(c)
- P(f);N_GUARD::QAB1(D)
- P(g);N_GUARD::S(O)
- Refutation
- P(d);
- Try
- B(N);XS(h)
- Threat
- B(L)
- Vars
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- P(g);N_GUARD::S(O)
- Refutation
- P(d);
- Try
- R(A);
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- P(d);OGATEB::R(A)
- P(f);N_GUARD::QAB1(D)
- P(g);N_GUARD::S(O)
- Refutation
- P(c);XP(G)
- Try
- R(A);
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- P(d);OGATEB::R(A)
- P(f);N_GUARD::QAB1(D)
- P(g);N_GUARD::S(O)
- Refutation
- P(c);XP(G)
- Try
- P(G);XP(c)
- Threat
- QAB(D)
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- P(f);N_GUARD,XP(G)::QAB1(D)
- Refutation
- P(d);
- Try
- P(G);
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- S(h);N_GUARD,XP(J)::B(L)
- P(g);N_GUARD::S(O)
- Refutation
- P(d);
- Try
- P(H);
- Threat
- QAR1(D)
- Vars
- S(h);CHECK,OGATE,XP(H)::QAB1(D),XS(h)
- K(e);P-FLIGHT,P_SPINP(g)::QAB1(D)
- Refutation
- S(h);XP(J)
- Try
- P(J);
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- R(i);N_GUARD,XB(N)::S(O),XP(g)
- P(c);OGATE,XP(G)::QAB(D),XP(c)
- P(f);N_GUARD::QAB1(D)
- S(h);N_GUARD::B(L)
- P(g);N_GUARD::S(O)
- Refutation
- P(d);
- Try
- P(K);
- Threat
- B(L)
- Vars
- S(h);CHECK,N_GUARD::B(L),XS(h)
- R(i);N_GUARD,XS(M)::S(O),XP(g)
- Refutation
- P(d);
- Try
- Actual
- P(H);EP,XP(f)
- Threat
- QAR1(D)
- Vars
- S(h);CHECK,N_GUARD::QAB1(D),XS(h)
- P(g);CHECK,XP(H)::S(O),XP(g)
- K(e);P-FLIGHT,P_SPINP(g)::QAB1(D)
- P(g);::QAB1(D)
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).