MESON Chess Problem Database

Problem Display
PID: 418 (8/1p4QK/qp6/2p2p2/R2n1k2/b4Bpp/1n1P2P1/2N2R2 w - - 0 1)

Chandler, Guy Wills

The Observer, 1945

(First published on Sun Jun 17 1945)

8/1p4QK/qp6/2p2p2/R2n1k2/b4Bpp/1n1P2P1/2N2R2

#2

8 + 11

6104 A Tribute to G W Chandler 1997
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Sxe2#
    • 1...Qa5
      • 2.Se2#
      • 2.Bd5#
      • 2.Bc6#
      • 2.Bxb7#
    • 1...Qa7
      • 2.Se2#
      • 2.Bd5#
      • 2.Bc6#
      • 2.Bxb7#
    • 1...Qa8
      • 2.Se2#
      • 2.Bd5#
      • 2.Bc6#
      • 2.Bxb7#
    • 1...Sd3
      • 2.Se2#
    • 1...Sc4
      • 2.Sd3#
    • 1...b5
      • 2.Se2#
      • 2.Bd5#
      • 2.Bc6#
      • 2.Bxb7#
  • Tries
    • 1.Kg6?
      • threat
        • 2.Qc7#
      • 1...Qe2
        • 2.Sxe2#
      • 1...Sd3
        • 2.Se2#
      • 1...Sc4
        • 2.Sd3#
      • 1...c4
        • 2.Qxd4#
      • 1...b5+!
    • 1.Re1?
      • threat
        • 2.Qh6#
      • 1...Qe2
        • 2.Sxe2#
      • 1...b5
        • 2.Se2#
      • 1...hxg2!
    • 1.Rc4?
      • threat
        • 2.Se2#
        • 2.Bd5#
        • 2.Bc6#
        • 2.Bxb7#
      • 1...Sxc4
        • 2.Sd3#
      • 1...hxg2
        • 2.Se2#
        • 2.Bxg2#
      • 1...Sd1
        • 2.Se2#
        • 2.Sd3#
      • 1...Sd3
        • 2.Se2#
        • 2.Sxd3#
      • 1...Qxc4!
    • 1.Qxd4+?
      • 1...Kg5
        • 2.Qg7#
        • 2.Qh4#
        • 2.Qd8#
      • 1...cxd4!
  • Keys
    • 1.Kh6!
      • threat
        • 2.Qc7#
      • 1...b5+
        • 2.Bc6#
      • 1...Qe2
        • 2.Sxe2#
      • 1...Sd3
        • 2.Se2#
      • 1...Sc4
        • 2.Sd3#
      • 1...c4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(i);N_GUARD::S(A),XQ(i)
    • S(a);S_CUTQ(i)::S(A)
    • S(a);N_GUARD,N_SPINS(e),S_CUTQ(i)::S(A)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB(G)
      • Vars
        • Q(i);N_GUARD::S(A),XQ(i)
        • S(a);S_CUTQ(i)::S(A)
        • S(a);N_GUARD,N_SPINS(e),S_CUTQ(i)::S(A)
        • P(g);N_GUARD,N_SPINS(e)::QAR2(G),XS(e)
      • Refutation
        • P(j);CHECK
    • Try
      • R(B);
      • Threat
        • QAB(G)
      • Vars
        • Q(i);N_GUARD::S(A),XQ(i)
        • P(j);S_CUTQ(i)::S(A)
      • Refutation
        • P(d);XP(D)
    • Try
      • R(F);
      • Threat
        • DUALS(4)
      • Vars
        • S(a);N_GUARD,N_SPINS(e),XR(F)::S(A)
      • Refutation
        • Q(i);N_SPINS(e),XR(F)
    • Try
      • Q(G);CHECK,XS(e)
      • Refutation
        • P(g);P_SPINP(g),XQ(G)
  • Actual
    • K(H);P-FLIGHT
    • Threat
      • QAB(G)
    • Vars
      • P(j);CHECK,S_CUTQ(i)::R(B)+B(E)
      • Q(i);N_GUARD::S(A),XQ(i)
      • S(a);S_CUTQ(i)::S(A)
      • S(a);N_GUARD,N_SPINS(e),S_CUTQ(i)::S(A)
      • P(g);N_GUARD,N_SPINS(e)::QAR2(G),XS(e)
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