MESON Chess Problem Database

Problem Display
PID: 11129 (kr1n3Q/2R2p2/PPRNpP2/1nK1p3/4B3/8/8/8 w - - 0 1)

ten Cate, Pieter

3rd Prize, South African Chess Magazine, 1936-1937

kr1n3Q/2R2p2/PPRNpP2/1nK1p3/4B3/8/8/8

#2

9 + 7

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb6
      • 2.Rxb6#
    • 1...Rc8
      • 2.Rxc8#
    • 1...Sa3
      • 2.Ra7#
    • 1...Sc3
      • 2.Ra7#
    • 1...Sd4
      • 2.Ra7#
    • 1...Sxd6
      • 2.Ra7#
    • 1...Sa7
      • 2.Rxa7#
    • 1...Sxc6
      • 2.Bxc6#
    • 1...Sb7+
      • 2.axb7#
  • Tries
    • 1.Kxb5?
      • threat
        • 2.Ra7#
      • 1...Rxb6+
        • 2.Rxb6#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Sb7
        • 2.axb7#
      • 1...Rb7!
    • 1.Sxb5?
      • threat
        • 2.Ra7#
      • 1...Sb7+
        • 2.axb7#
      • 1...Rxb6
        • 2.Rxb6#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rb7!
    • 1.Rd7?
      • 1...Sb7+
        • 2.axb7#
      • 1...Rxb6
        • 2.Rxb6#
        • 2.Rc8#
      • 1...Sxd6
        • 2.Ra7#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Rb7
        • 2.Rc8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Sa3
        • 2.Ra7#
      • 1...Sc3
        • 2.Ra7#
      • 1...Sd4
        • 2.Ra7#
      • 1...Sa7
        • 2.Rxa7#
      • 1...Sc7!
    • 1.Re7?
      • 1...Sb7+
        • 2.axb7#
      • 1...Rxb6
        • 2.Rxb6#
        • 2.Rc8#
      • 1...Sxd6
        • 2.Ra7#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Rb7
        • 2.Rc8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Sa3
        • 2.Ra7#
      • 1...Sc3
        • 2.Ra7#
      • 1...Sd4
        • 2.Ra7#
      • 1...Sa7
        • 2.Rxa7#
      • 1...Sc7!
    • 1.Rxf7?
      • 1...Sb7+
        • 2.axb7#
      • 1...Rxb6
        • 2.Rxb6#
        • 2.Rc8#
      • 1...Sxd6
        • 2.Ra7#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Sxf7
        • 2.Rc7#
        • 2.Rc8#
      • 1...Rb7
        • 2.Rc8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Sa3
        • 2.Ra7#
      • 1...Sc3
        • 2.Ra7#
      • 1...Sd4
        • 2.Ra7#
      • 1...Sa7
        • 2.Rxa7#
      • 1...Sc7!
    • 1.Qxd8?
      • 1...Sxd6
        • 2.Rxd6#
        • 2.Ra7#
      • 1...Sxc7
        • 2.Rxc7#
      • 1...Rc8
        • 2.Rxc8#
        • 2.Qxc8#
      • 1...Sa3
        • 2.Ra7#
      • 1...Sc3
        • 2.Ra7#
      • 1...Sd4
        • 2.Ra7#
      • 1...Sa7
        • 2.Rxa7#
        • 2.b7#
      • 1...Rxd8!
  • Keys
    • 1.Rb7!
      • 1...Sxb7+
        • 2.axb7#
      • 1...Rxb7
        • 2.Rc8#
      • 1...Sxd6
        • 2.Ra7#
      • 1...Sxc6
        • 2.Rxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Sa3
        • 2.Ra7#
      • 1...Sc3
        • 2.Ra7#
      • 1...Sd4
        • 2.Ra7#
      • 1...Sa7
        • 2.Rxa7#
      • 1...Sc7
        • 2.Ra7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(f);OGATE,P_SPINS(g),XP(D)::B(A)+R(E),XR(f)
    • R(f);OGATEB::R(H),XR(f)
    • S(a);N_GUARD::R1(H)
    • S(a);N_GUARD,XS(F)::R1(H)
    • S(a);N_GUARD::R1(H),XS(a)
    • S(g);OGATE,P_SPINR(f),P_SPINS(g),XR(E)::B(A),XS(g)
    • S(g);CHECK,OGATE,P_SPINR(f)::P(C),XS(g)
  • Tries
    • Try
      • K(B);P-FLIGHT,P_SPINP(D),XS(a)
      • Threat
        • R1(H)
      • Vars
        • R(f);CHECK,OGATE,P_SPINS(g),XP(D)::B(A)+R(E),XR(f)
        • R(f);N_PINP(D),OGATEB::R(H),XR(f)
        • S(g);N_PINP(D),OGATE,P_SPINR(f)::P(C),XS(g)
      • Refutation
        • R(f);P_SPINS(g)
    • Try
      • S(F);XS(a)
      • Threat
        • R1(H)
      • Vars
        • S(g);CHECK,OGATE,P_SPINR(f)::P(C),XS(g)
        • R(f);OGATE,P_SPINS(g),XP(D)::B(A)+R(E),XR(f)
        • R(f);OGATEB::R(H),XR(f)
      • Refutation
        • R(f);P_SPINS(g)
    • Try
      • R(H);
      • Vars
        • S(g);CHECK,OGATE,P_SPINR(f)::P(C),XS(g)
        • S(a);N_GUARD,XS(F)::R1(H)
        • S(g);OGATE,P_SPINR(f),P_SPINS(g),XR(E)::B(A),XS(g)
        • R(f);P_SPINS(g)::R(E)
        • R(f);P_PINR(E)::B(A)+R(E),DCHECK,XR(f)
        • S(a);N_GUARD::R1(H)
        • S(a);N_GUARD::R1(H),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(H);
      • Vars
        • S(g);CHECK,OGATE,P_SPINR(f)::P(C),XS(g)
        • S(a);N_GUARD,XS(F)::R1(H)
        • S(g);OGATE,P_SPINR(f),P_SPINS(g),XR(E)::B(A),XS(g)
        • R(f);P_SPINS(g)::R(E)
        • R(f);P_PINR(E)::B(A)+R(E),DCHECK,XR(f)
        • S(a);N_GUARD::R1(H)
        • S(a);N_GUARD::R1(H),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(H);XP(d)
      • Vars
        • S(g);CHECK,OGATE,P_SPINR(f)::P(C),XS(g)
        • S(a);N_GUARD,XS(F)::R1(H)
        • S(g);OGATE,P_SPINR(f),P_SPINS(g),XR(E)::B(A),XS(g)
        • R(f);P_SPINS(g)::R(E)
        • R(f);P_PINR(E)::B(A)+R(E),DCHECK,XR(f)
        • S(a);N_GUARD::R1(H)
        • S(a);N_GUARD::R1(H),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(I);P_PINR(f),XS(g)
      • Vars
        • S(a);OGATE,XR(H)::B(A)+R(E),XS(a)
        • S(a);N_GUARD::R1(H)
      • Refutation
        • R(f);N_SPINR(f),XQ(I)
  • Actual
    • R(H);
    • Vars
      • S(g);CHECK,OGATE,P_SPINR(f),XR(H)::P(C),XS(g)
      • R(f);OGATEB,P_SPINS(g),XR(H)::R(E)
      • S(a);N_GUARD,XS(F)::R1(H)
      • S(g);P_SPINR(f),XR(E)::R1(H),XR(f)
      • R(f);OGATEB,P_PINR(E)::R(E),XR(f)
      • S(a);N_GUARD::R1(H)
      • S(a);N_GUARD::R1(H),XS(a)
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