MESON Chess Problem Database

Problem Display
PID: 11324 (3b1N2/3R4/2n2p1B/3qPk2/2P1Np2/3P3P/1Q6/1B5K w - - 0 1)

Chapman, RN

Pickering, SA

Chess, 1938

3b1N2/3R4/2n2p1B/3qPk2/2P1Np2/3P3P/1Q6/1B5K

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Sd6#
    • 1...Qxe4+
      • 2.dxe4#
    • 1...Qf7
      • 2.Sd6#
    • 1...Qg8
      • 2.Sd6#
    • 1...Qxd3
      • 2.Sd6#
    • 1...Qa5
      • 2.Sd6#
    • 1...Qb5
      • 2.Sd6#
    • 1...Qd6
      • 2.Sxd6#
    • 1...f3
      • 2.Sg3#
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qh5#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Kxe5
        • 2.Rxd5#
      • 1...Qxd3
        • 2.Sd6#
      • 1...fxe5
        • 2.Qg4#
      • 1...Qf7
        • 2.Sd6#
      • 1...Qg8
        • 2.Sd6#
      • 1...f3
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_PINS(G),XP(F)::S(G)
    • Q(b);CHECK,OGATE,XS(G)::P(D),XQ(b)
    • Q(b);N_PINS(G)::S(G)
    • Q(b);N_PINS(G),XP(D)::S(G)
    • Q(b);N_PINS(G)::S(G),XQ(b)
    • P(a);N_PINS(G)::S(G)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • Q(b);CHECK,OGATE,XS(G)::QAB1(C),XQ(b)
      • K(c);OGATEB,P-FLIGHT,XP(H)::R1(J),XQ(b)
      • Q(b);N_PINS(G),XP(D)::S(G)
      • P(e);SBLOCK,XP(H)::QAB1(C)
      • Q(b);N_PINS(G)::S(G)
      • P(a);N_PINS(G)::S(G)
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