MESON Chess Problem Database

Problem Display
PID: 76436 (1N3R2/8/1Q1qk3/3n4/K2P2PB/8/B1n5/1R6 w - - 0 1)

Cafferata, Louis William

The Tablet, 1930

(First published on Sat Dec 20 1930)

1N3R2/8/1Q1qk3/3n4/K2P2PB/8/B1n5/1R6

#2

9 + 4

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb6
      • 2.Rxb6#
    • 1...Qc6+
      • 2.Qxc6#
    • 1...Sa1
      • 2.Re1#
    • 1...Se1
      • 2.Rxe1#
    • 1...Sa3
      • 2.Re1#
    • 1...Sb4
      • 2.Re1#
  • Tries
    • 1.Bd8?
      • threat
        • 2.Rf6#
      • 1...Qc6+
        • 2.Qxc6#
      • 1...Sxd4!
    • 1.Re1+?
      • 1...Se3
        • 2.Rxe3#
      • 1...Sxe1!
    • 1.Rbf1?
      • threat
        • 2.Re8#
      • 1...Qc6+
        • 2.Qxc6#
      • 1...Qxb6!
    • 1.Rf5?
      • threat
        • 2.Bxd5#
      • 1...Qc6+
        • 2.Qxc6#
      • 1...Qxb6
        • 2.Rxb6#
      • 1...Sb4
        • 2.Re1#
      • 1...Se3!
  • Keys
    • 1.Rb3!
      • 1...Qc6+
        • 2.Qxc6#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Sxb6+
        • 2.Rxb6#
      • 1...Qxb6
        • 2.Rxb6#
      • 1...Sxd4
        • 2.Re3#
      • 1...Sde3
        • 2.Rxe3#
      • 1...Sdb4
        • 2.Re3#
        • 2.Rxb4#
      • 1...Sf4
        • 2.Re3#
      • 1...Sf6
        • 2.Re3#
      • 1...Sc7
        • 2.Re3#
      • 1...Se7
        • 2.Re3#
      • 1...Sce3
        • 2.Rxe3#
      • 1...Sa1
        • 2.Re3#
      • 1...Se1
        • 2.Re3#
      • 1...Sa3
        • 2.Re3#
      • 1...Scb4
        • 2.Re3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_SPINQ(c),OGATE,XQ(G)::R(A),XQ(c)
    • Q(c);CHECK,OGATEB::QAR2(G),XQ(c)
    • S(a);N_GUARD::R(A)
    • S(a);N_GUARD::R(A),XS(a)
  • Tries
    • Try
      • B(F);
      • Threat
        • R1(I)
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(G),XQ(c)
      • Refutation
        • S(a);XP(D)
    • Try
      • R(A);CHECK
      • Vars
        • S(a);N_GUARD,N_SPINS(b),P_SPINS(a)::R(A),XS(a)
      • Refutation
        • S(a);XR(A)
    • Try
      • R(A);
      • Threat
        • R(I)
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(G),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(G)
    • Try
      • R(I);
      • Threat
        • B(B),XS(b)
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(G),XQ(c)
        • Q(c);N_SPINQ(c),OGATE,XQ(G)::R(A),XQ(c)
        • S(a);N_GUARD::R(A)
      • Refutation
        • S(a);
  • Actual
    • R(A);N_PINS(b)
    • Vars
      • Q(c);CHECK,OGATEB::QAR2(G),XQ(c)
      • S(b);CHECK,OGATEB::B(B)+R(A),XS(b)
      • S(b);CHECK,N_SPINQ(c),OGATE,XQ(G)::B(B)+R(A),XS(b)
      • Q(c);N_SPINQ(c),OGATE,XQ(G)::R(A),XQ(c)
      • S(a);N_GUARD,XP(D)::R(A)
      • S(b);::B(B)+R(A),DCHECK,XS(b)
      • S(b);::B(B)+R(A),DCHECK
      • S(a);N_GUARD::R(A),XS(a)
      • S(a);N_GUARD::R(A)
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