MESON Chess Problem Database

Problem Display
PID: 199744 (1q2r3/1N1n4/p1nQ2R1/Pkb4R/pB2r3/p6p/B1N3bK/8 w - - 0 1)

Rains, Cyril George

The Observer, 1946

(First published on Sun Jul 7 1946)

1q2r3/1N1n4/p1nQ2R1/Pkb4R/pB2r3/p6p/B1N3bK/8

#2

9 + 12

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6+
      • 2.Sxd6#
    • 1...Qa7
      • 2.Qxc6#
    • 1...Qa8
      • 2.Qxc6#
    • 1...Qd8
      • 2.Qxc6#
    • 1...Rxb4
      • 2.Sxa3#
    • 1...R4e5
      • 2.Qd3#
    • 1...R8e5
      • 2.Qxc6#
    • 1...Sxb4
      • 2.Sxa3#
    • 1...Sce5
      • 2.Qxa6#
    • 1...Sde5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Rxc5#
    • 1...Sf6
      • 2.Rxc5#
    • 1...Sf8
      • 2.Rxc5#
  • Tries
    • 1.Bd2?
      • threat
        • 2.Sxa3#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...R4e5
        • 2.Qd3#
      • 1...R8e5
        • 2.Qxc6#
      • 1...Sce5
        • 2.Qxa6#
      • 1...Sde5
        • 2.Qxc5#
      • 1...Re3!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Sxa3#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...R4e5
        • 2.Qd3#
      • 1...R8e5
        • 2.Qxc6#
      • 1...Sce5
        • 2.Qxa6#
      • 1...Sde5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(k);CHECK,XQ(G)::S(I),XQ(k)
    • Q(k);N_PINQ(G)::QAB1(G),XS(i)
    • R(e);SBLOCK,XB(D)::S(B),XP(b)
    • R(e);N_PINQ(G),N_SPINB(g)::QAB(G)
    • R(l);N_PINQ(G),N_SPINB(g)::QAB1(G),XS(i)
    • S(i);SBLOCK,XB(D)::S(B),XP(b)
    • S(i);N_PINQ(G),N_SPINB(g)::QAB1(G),XP(h)
    • S(j);N_PINQ(G),N_SPINB(g)::QAR1(G),XB(g)
    • S(j);N_GUARD::R1(F),XB(g)
  • Tries
    • Try
      • B(D);
      • Threat
        • S(B),XP(b)
      • Vars
        • Q(k);CHECK,XQ(G)::S(I),XQ(k)
        • R(e);N_PINQ(G),N_SPINB(g)::QAB(G)
        • R(l);N_PINQ(G),N_SPINB(g)::QAB1(G),XS(i)
        • S(i);N_PINQ(G),N_SPINB(g)::QAB1(G),XP(h)
        • S(j);N_PINQ(G),N_SPINB(g)::QAR1(G),XB(g)
      • Refutation
        • R(e);
  • Actual
    • B(D);
    • Threat
      • S(B),XP(b)
    • Vars
      • Q(k);CHECK,XQ(G)::S(I),XQ(k)
      • R(e);N_PINQ(G),N_SPINB(g)::QAB(G)
      • R(l);N_PINQ(G),N_SPINB(g)::QAB1(G),XS(i)
      • S(i);N_PINQ(G),N_SPINB(g)::QAB1(G),XP(h)
      • S(j);N_PINQ(G),N_SPINB(g)::QAR1(G),XB(g)
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