MESON Chess Problem Database

Problem Display
PID: 226684 (3R1N1K/1b4n1/4B2b/3pk2p/8/5R2/3N4/5nQ1 w - - 0 1)

Conway-Poole, IM

Sunday Chronicle, 1945

(First published on Sun Oct 28 1945)

3R1N1K/1b4n1/4B2b/3pk2p/8/5R2/3N4/5nQ1

#2

7 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qxg7#
    • 1...Bf4
      • 2.Qxg7#
    • 1...Ba6
      • 2.Rxd5#
    • 1...Bc8
      • 2.Rxd5#
    • 1...Sf5
      • 2.Rxf5#
    • 1...Sxe6
      • 2.Sg6#
    • 1...Se8
      • 2.Rf5#
    • 1...d4
      • 2.Qxd4#
  • Tries
    • 1.Sc4+?
      • 1...dxc4
        • 2.Qd4#
      • 1...Ke4!
    • 1.Qg4?
      • threat
        • 2.Sg6#
      • 1...Bf4
        • 2.Qxf4#
        • 2.Qxg7#
      • 1...Sf5
        • 2.Rxf5#
      • 1...hxg4!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qd4#
      • 1...Kxf4
        • 2.Sg6#
      • 1...Bxf4
        • 2.Qxg7#
      • 1...Sxe6
        • 2.Sg6#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Se3
        • 2.Qxe3#
      • 1...d4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(e);N_GUARD::QAB(A),XS(g)
    • B(f);N_GUARD::R1(E),XP(b)
    • S(g);N_GUARD::R1(C),XS(g)
    • S(g);SBLOCK,XB(D)::S(F)
    • S(g);N_GUARD::R1(C)
    • P(b);::QAB1(A),XP(b)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(b);XS(B)::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • S(g);N_GUARD::R1(C),XS(g)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • R(C);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);S_FLIGHT,XR(C)::S(F)
      • B(e);N_GUARD,SBLOCK,XR(C)::QAB(A),XS(g)
      • S(g);SBLOCK,XB(D)::S(F)
      • S(g);N_GUARD::R1(C),XS(g)
      • S(a);N_GUARD::QAR2(A),XS(a)
      • P(b);::QAB1(A),XP(b)
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