MESON Chess Problem Database

Problem Display
PID: 146251 (2R1R3/bp1Q1pp1/N2P2B1/3p4/3k4/3b2p1/1K1N1qr1/6B1 w - - 0 1)

Wynne, RL

The Observer, 1938

(First published on Sun Nov 27 1938)

2R1R3/bp1Q1pp1/N2P2B1/3p4/3k4/3b2p1/1K1N1qr1/6B1

#2

9 + 10

14868 Pirnie Collection 2012
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Bxe3#
    • 1...Bb1
      • 2.Qa4#
    • 1...Bf1
      • 2.Qg4#
    • 1...Bc2
      • 2.Sf3#
    • 1...Be2
      • 2.Sb3#
    • 1...Bc4
      • 2.Qg4#
    • 1...Bb5
      • 2.Qg4#
    • 1...Bxa6
      • 2.Qg4#
    • 1...bxa6
      • 2.Qxa7#
    • 1...b5
      • 2.Qxa7#
    • 1...fxg6
      • 2.Qxg7#
    • 1...f5
      • 2.Qxg7#
  • Tries
    • 1.Bxf2+?
      • 1...gxf2
        • 2.Sb3#
        • 2.Sf3#
      • 1...Rxf2!
    • 1.Rc4+?
      • 1...Bxc4
        • 2.Qg4#
      • 1...dxc4!
    • 1.Qc7?
      • threat
        • 2.Qc3#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bc4!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Rxd3#
      • 1...Bxa6
        • 2.Qg4#
      • 1...Bxg6
        • 2.Qa4#
      • 1...bxa6
        • 2.Qxa7#
      • 1...fxg6
        • 2.Qxg7#
      • 1...Bb1
        • 2.Qa4#
      • 1...Bf1
        • 2.Qg4#
      • 1...Bc2
        • 2.Sf3#
      • 1...Be2
        • 2.Sb3#
      • 1...Bc4
        • 2.Qg4#
      • 1...Be4
        • 2.Qa4#
      • 1...Bb5
        • 2.Qg4#
      • 1...Bf5
        • 2.Qa4#
      • 1...f5
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);OGATE::B(A),XQ(a)
    • B(c);N_GUARD::QAR(G)
    • B(c);N_PINS(C)::S(C)
    • B(c);N_GUARD,XS(D)::QAR(G)
    • P(h);OGATE,XS(D)::QAB(G),XB(g)
    • P(h);OGATE::QAB(G),XB(g)
    • P(i);OGATE,XB(F)::QAB(G),XP(j)
    • P(i);OGATE::QAB(G),XP(j)
  • Tries
    • Try
      • B(A);CHECK,N_SPINS(C),XQ(a)
      • Refutation
        • R(b);P_PINS(C),XB(A)
    • Try
      • R(H);CHECK
      • Vars
        • B(c);XR(H)::QAR(G)
      • Refutation
        • P(f);XR(H)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • B(g);N_GUARD::QAB1(G),XB(g)
      • Refutation
        • B(c);
  • Actual
    • R(H);
    • Threat
      • R1(H),XB(c)
    • Vars
      • B(c);N_GUARD,XS(D)::QAR(G)
      • B(c);N_GUARD,XB(F)::QAR(G)
      • P(h);OGATE,XS(D)::QAB(G),XB(g)
      • P(i);OGATE,XB(F)::QAB(G),XP(j)
      • B(c);N_GUARD::QAR(G)
      • B(c);N_PINS(C)::S(C)
      • P(i);OGATE::QAB(G),XP(j)
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