MESON Chess Problem Database

Problem Display
PID: 272755 (3Q3b/3P4/p3B1p1/PbRN4/1prk4/1np3BK/2P5/4R2n w - - 0 1)

Groeneveld, Cornelis

The Problemist, 1957

3Q3b/3P4/p3B1p1/PbRN4/1prk4/1np3BK/2P5/4R2n

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qb6#
    • 1...Rxc5
      • 2.Qh4#
    • 1...Sf2+
      • 2.Bxf2#
    • 1...Sxc5
      • 2.Qxh8#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Rd5#
      • 1...Sf2+
        • 2.Bxf2#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Sxc5
        • 2.Qxh8#
      • 1...Bc6
        • 2.Rxc4#
      • 1...Rxc5!
    • 1.Sb6?
      • threat
        • 2.Rd5#
      • 1...Sf2+
        • 2.Bxf2#
      • 1...Rxc5
        • 2.Qh4#
      • 1...Sxc5
        • 2.Qxh8#
      • 1...Bc6
        • 2.Rxc4#
      • 1...Kxc5!
    • 1.Sc7?
      • threat
        • 2.Rd5#
      • 1...Sf2+
        • 2.Bxf2#
      • 1...Rxc5
        • 2.Qh4#
      • 1...Sxc5
        • 2.Qxh8#
      • 1...Bc6
        • 2.Rxc4#
      • 1...Kxc5!
    • 1.Se7?
      • threat
        • 2.Rd5#
      • 1...Sf2+
        • 2.Bxf2#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Sxc5
        • 2.Qxh8#
      • 1...Bc6
        • 2.Rxc4#
      • 1...Rxc5!
    • 1.Be5+?
      • 1...Kxc5
        • 2.Qb6#
      • 1...Bxe5!
    • 1.Re4+?
      • 1...Kxc5
        • 2.Qb6#
      • 1...Kxe4!
    • 1.Rxb5?
      • threat
        • 2.Qh4#
        • 2.Qxh8#
      • 1...Sf2+
        • 2.Bxf2#
      • 1...Sxg3
        • 2.Qxh8#
      • 1...Rc5
        • 2.Qh4#
      • 1...Rc6
        • 2.Qh4#
      • 1...Rc7
        • 2.Qh4#
      • 1...Rc8
        • 2.Qh4#
      • 1...Be5
        • 2.Bxe5#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bg7
        • 2.Qh4#
      • 1...Sd2
        • 2.Qxh8#
      • 1...Sc5
        • 2.Qxh8#
      • 1...g5
        • 2.Qxh8#
      • 1...axb5!
    • 1.Qg5?
      • threat
        • 2.Qe3#
      • 1...Sf2+
        • 2.Bxf2#
      • 1...Rxc5
        • 2.Qf4#
        • 2.Qh4#
        • 2.Qg4#
      • 1...Kxc5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rd5#
      • 1...Sf2+
        • 2.Bxf2#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Rxc5
        • 2.Re4#
      • 1...Sxc5
        • 2.Be5#
      • 1...Bc6
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);OGATEB,S_FLIGHT,XR(F)::QAB1(J)
    • R(e);SBLOCK,XR(F)::QAR(J)
    • S(a);CHECK,N_GUARD::B(C),XS(a)
    • S(b);SBLOCK,XR(F)::QAB(J),XB(j)
  • Tries
    • Try
      • S(G);
      • Threat
        • R1(F)
      • Vars
        • S(a);CHECK,N_GUARD::B(C),XS(a)
        • K(f);OGATEB,S_FLIGHT,XR(F)::QAB1(J)
        • S(b);SBLOCK,XR(F)::QAB(J),XB(j)
        • B(g);N_GUARD::R1(F),XR(e)
      • Refutation
        • R(e);XR(F)
    • Try
      • S(G);
      • Threat
        • R1(F)
      • Vars
        • S(a);CHECK,N_GUARD::B(C),XS(a)
        • R(e);SBLOCK,XR(F)::QAR(J)
        • S(b);SBLOCK,XR(F)::QAB(J),XB(j)
        • B(g);N_GUARD::R1(F),XR(e)
      • Refutation
        • K(f);S_FLIGHT,XR(F)
    • Try
      • S(G);
      • Threat
        • R1(F)
      • Vars
        • S(a);CHECK,N_GUARD::B(C),XS(a)
        • R(e);SBLOCK,XR(F)::QAR(J)
        • S(b);SBLOCK,XR(F)::QAB(J),XB(j)
        • B(g);N_GUARD::R1(F),XR(e)
      • Refutation
        • K(f);S_FLIGHT,XR(F)
    • Try
      • S(G);
      • Threat
        • R1(F)
      • Vars
        • S(a);CHECK,N_GUARD::B(C),XS(a)
        • K(f);OGATEB,S_FLIGHT,XR(F)::QAB1(J)
        • S(b);SBLOCK,XR(F)::QAB(J),XB(j)
        • B(g);N_GUARD::R1(F),XR(e)
      • Refutation
        • R(e);XR(F)
    • Try
      • B(C);CHECK
      • Vars
        • K(f);S_CUTB(j),S_FLIGHT,XR(F)::QAB1(J)
      • Refutation
        • B(j);XB(C)
    • Try
      • R(A);CHECK
      • Vars
        • K(f);N_GUARD,S_FLIGHT,XR(F)::QAB1(J)
      • Refutation
        • K(f);P-FLIGHT,XR(A)
    • Try
      • R(F);XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::B(C),XS(a)
        • S(a);XB(C)::QAB(J),XB(j)
        • R(e);::QAR(J)
        • B(j);N_GUARD::B(C),XB(j)
        • B(j);N_GUARD::QAB(J),XB(j)
        • B(j);::QAR(J)
        • S(b);::QAB(J),XB(j)
        • P(i);::QAB(J),XB(j)
      • Refutation
        • P(h);XR(F)
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • S(a);CHECK,N_GUARD::B(C),XS(a)
      • Refutation
        • K(f);S_FLIGHT,XR(F)
  • Actual
    • S(G);
    • Threat
      • R1(F)
    • Vars
      • S(a);CHECK,N_GUARD::B(C),XS(a)
      • K(f);OGATEB,S_FLIGHT,XR(F)::QAB1(J)
      • R(e);SBLOCK,XR(F)::R1(A)
      • S(b);SBLOCK,XR(F)::B(C)
      • B(g);N_GUARD::R1(F),XR(e)
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Developed and maintained by Brian Stephenson.
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