MESON Chess Problem Database
Problem Display
PID: 10353 (Nb4B1/2pp4/R2pbP2/p2kp1Qp/3P3P/2KR1P2/2N5/5n2 w - - 0 1)
Strydom, Jan
The Problemist, 1963
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Bf7
- 2.Bxf7#
- 1...Bxg8
- 2.Qxg8#
- 1...Ba7
- 2.Sxc7#
- 1...Sd2
- 2.Se3#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...a4
- 2.Sb4#
- 1...c5
- 2.dxe5#
- 1...c6
- 2.Sb6#
- 1...Bf7
- Tries
- 1.Bf7?
- 1...Sd2
- 2.Se3#
- 1...Ba7
- 2.Sxc7#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...a4
- 2.Sb4#
- 1...c5
- 2.dxe5#
- 1...c6
- 2.Sb6#
- 1...Bxf7!
- 1...Sd2
- 1.Rd1?
- 1...Bxg8
- 2.Qxg8#
- 1...Bf7
- 2.Bxf7#
- 1...Sd2
- 2.Se3#
- 1...Ba7
- 2.Sxc7#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...a4
- 2.Sb4#
- 1...c6
- 2.Sb6#
- 1...c5!
- 1...Bxg8
- 1.Rd2?
- 1...Bxg8
- 2.Qxg8#
- 1...Sxd2
- 2.Se3#
- 1...Bf7
- 2.Bxf7#
- 1...Ba7
- 2.Sxc7#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...a4
- 2.Sb4#
- 1...c6
- 2.Sb6#
- 1...c5!
- 1...Bxg8
- 1.Rxa5+?
- 1...c5
- 2.Sb4#
- 1...Kc6!
- 1...c5
- 1.Qe3?
- threat
- 2.Qe4#
- 2.dxe5#
- 1...exd4+
- 2.Qxd4#
- 1...Sxe3
- 2.Sxe3#
- 1...Bf7
- 2.Bxf7#
- 1...Sd2
- 2.dxe5#
- 1...Ba7
- 2.Sxc7#
- 2.Qe4#
- 1...Sg3
- 2.dxe5#
- 1...e4
- 2.Qg5#
- 2.Qxe4#
- 2.fxe4#
- 1...Bxg8!
- threat
- 1.Qg3?
- 1...Bxg8
- 2.Qxg8#
- 1...Sxg3
- 2.Se3#
- 1...Bf7
- 2.Bxf7#
- 1...Sd2
- 2.Se3#
- 1...Ba7
- 2.Sxc7#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...a4
- 2.Sb4#
- 1...e4
- 2.Qg5#
- 1...c5
- 2.dxe5#
- 1...c6
- 2.Sb6#
- 1...exd4+!
- 1...Bxg8
- 1.Qg4?
- threat
- 2.Qe4#
- 1...exd4+
- 2.Qxd4#
- 1...Bxg8
- 2.Qxg8#
- 1...Sd2
- 2.Se3#
- 1...Bf7
- 2.Bxf7#
- 1...Sg3
- 2.Se3#
- 1...e4
- 2.Qf5#
- 2.Qxh5#
- 2.Qxe4#
- 2.Qg5#
- 2.fxe4#
- 1...hxg4!
- threat
- 1.Qf5?
- threat
- 2.Qe4#
- 1...Sd2
- 2.Se3#
- 1...Bf7
- 2.Bxf7#
- 1...Sg3
- 2.Se3#
- 1...Bxg8!
- threat
- 1.Qxh5?
- 1...Bf7
- 2.Bxf7#
- 2.Qxf7#
- 1...Sd2
- 2.Se3#
- 1...Ba7
- 2.Sxc7#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...a4
- 2.Sb4#
- 1...c5
- 2.dxe5#
- 1...c6
- 2.Sb6#
- 1...Bxg8!
- 1...Bf7
- 1.Qg6?
- threat
- 2.Qe4#
- 1...Bxg8
- 2.Qxg8#
- 1...Bf7
- 2.Bxf7#
- 2.Qxf7#
- 1...Sd2
- 2.Se3#
- 1...Sg3
- 2.Se3#
- 1...e4
- 2.Qxe4#
- 2.Qf5#
- 2.Qxh5#
- 2.Qg5#
- 2.fxe4#
- 1...exd4+!
- threat
- 1.Bf7?
- Keys
- 1.Qg1!
- 1...exd4+
- 2.Qxd4#
- 1...Bxg8
- 2.Qxg8#
- 1...Bf7
- 2.Bxf7#
- 1...Sd2
- 2.Se3#
- 1...Ba7
- 2.Sxc7#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...a4
- 2.Sb4#
- 1...e4
- 2.Qg5#
- 1...c5
- 2.dxc5#
- 1...c6
- 2.Sb6#
- 1...exd4+
- 1.Qg1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(g);OGATEB::B(K),XB(g)
- B(g);N_SPINB(g),OGATE,XB(K)::QAB(G),XB(g)
- B(j);N_GUARD::S(J),XP(h)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(b);N_GUARD::S(A)
- P(h);SBLOCK::R(C)+P(E),XP(d)
- P(h);N_GUARD,SBLOCK::S(J)
- Tries
- Try
- B(K);
- Vars
- S(a);N_GUARD::S(A)
- B(j);N_GUARD::S(J),XP(h)
- S(a);N_GUARD::S(A),XS(a)
- P(b);N_GUARD::S(A)
- P(h);SBLOCK::R(C)+P(E),XP(d)
- P(h);N_GUARD,SBLOCK::S(J)
- Refutation
- B(g);N_SPINB(g),XB(K)
- Try
- R(C);
- Vars
- B(g);N_SPINB(g),OGATE,XB(K)::QAB(G),XB(g)
- B(g);OGATEB::B(K),XB(g)
- S(a);N_GUARD::S(A)
- B(j);N_GUARD::S(J),XP(h)
- S(a);N_GUARD::S(A),XS(a)
- P(b);N_GUARD::S(A)
- P(h);N_GUARD,SBLOCK::S(J)
- Refutation
- P(h);
- Try
- R(C);
- Vars
- B(g);N_SPINB(g),OGATE,XB(K)::QAB(G),XB(g)
- S(a);N_GUARD,XR(C)::S(A)
- B(g);OGATEB::B(K),XB(g)
- B(j);N_GUARD::S(J),XP(h)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(b);N_GUARD::S(A)
- P(h);N_GUARD,SBLOCK::S(J)
- Refutation
- P(h);
- Try
- R(H);CHECK,XP(b)
- Vars
- P(h);N_SPINP(d),P_SPINP(h)::S(A)
- Refutation
- K(c);N_SPINB(g),N_SPINP(d),S_FLIGHT
- Try
- Q(G);N_PINP(d)
- Threat
- DUALS(2)
- Vars
- P(d);CHECK,OGATE,P_SPINP(d),XP(E)::QAR1(G),XP(d)
- S(a);XQ(G)::S(A),XS(a)
- B(g);OGATEB::B(K),XB(g)
- S(a);::R(C)+P(E),XP(d)
- Refutation
- B(g);N_SPINB(g),XB(K)
- Try
- Q(G);N_PINP(d)
- Vars
- B(g);N_SPINB(g),OGATE,XB(K)::QAB(G),XB(g)
- S(a);N_GUARD,XQ(G)::S(A)
- B(g);OGATEB::B(K),XB(g)
- S(a);N_GUARD::S(A)
- B(j);N_GUARD::S(J),XP(h)
- S(a);N_GUARD::S(A),XS(a)
- P(b);N_GUARD::S(A)
- P(d);OGATEB::QAR(G)
- P(h);SBLOCK::R(C)+P(E),XP(d)
- P(h);N_GUARD,SBLOCK::S(J)
- Refutation
- P(d);CHECK,P_SPINP(d),XP(E)
- Try
- Q(G);N_PINP(d)
- Threat
- QAB1(G)
- Vars
- P(d);CHECK,OGATE,P_SPINP(d),XP(E)::QAR1(G),XP(d)
- B(g);N_SPINB(g),OGATE,XB(K)::QAB(G),XB(g)
- S(a);N_GUARD::S(A)
- B(g);OGATEB::B(K),XB(g)
- Refutation
- P(e);XQ(G)
- Try
- Q(G);
- Threat
- QAB1(G)
- Vars
- S(a);N_GUARD::S(A)
- B(g);OGATEB::B(K),XB(g)
- Refutation
- B(g);N_SPINB(g),XB(K)
- Try
- Q(G);XP(e)
- Vars
- S(a);N_GUARD::S(A)
- B(j);N_GUARD::S(J),XP(h)
- S(a);N_GUARD::S(A),XS(a)
- P(b);N_GUARD::S(A)
- P(h);SBLOCK::R(C)+P(E),XP(d)
- P(h);N_GUARD,SBLOCK::S(J)
- Refutation
- B(g);N_SPINB(g),XB(K)
- Try
- Q(G);N_PINP(d)
- Threat
- QAB1(G)
- Vars
- B(g);N_SPINB(g),OGATE,XB(K)::QAB(G),XB(g)
- S(a);N_GUARD::S(A)
- Refutation
- P(d);CHECK,P_SPINP(d),XP(E)
- Try
- Actual
- Q(G);N_PINP(d)
- Vars
- P(d);CHECK,OGATE,P_SPINP(d),XP(E)::QAR1(G),XP(d)
- B(g);N_SPINB(g),OGATE,XB(K)::QAB(G),XB(g)
- B(g);OGATEB::B(K),XB(g)
- S(a);N_GUARD::S(A)
- B(j);N_GUARD::S(J),XP(h)
- S(a);N_GUARD::S(A),XS(a)
- P(b);N_GUARD::S(A)
- P(d);OGATEB::QAR(G)
- P(h);OGATE::R(C)+P(E),XP(h)
- P(h);N_GUARD,SBLOCK::S(J)
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).