MESON Chess Problem Database

Problem Display
PID: 256445 (8/Q6K/7B/1p2p3/RN2kPR1/2P3b1/2b1n1P1/2qB3N w - - 0 1)

Wallis, Walter Warren

British Chess Magazine, 1933

8/Q6K/7B/1p2p3/RN2kPR1/2P3b1/2b1n1P1/2qB3N

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Bxc2#
    • 1...Qxf4
      • 2.Bxc2#
    • 1...Qa1
      • 2.Bxc2#
    • 1...Sg1
      • 2.Sxg3#
    • 1...Sxc3
      • 2.Sxg3#
    • 1...Sxf4
      • 2.Sxg3#
  • Tries
    • 1.Sf2+?
      • 1...Kf5
        • 2.Qf7#
      • 1...Bxf2!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Rxe5#
      • 1...Kxf4+
        • 2.Sd3#
      • 1...Qxf4
        • 2.Bxc2#
      • 1...Bxf4
        • 2.Sf2#
      • 1...Sxf4
        • 2.Sxg3#
        • 2.Bf3#
      • 1...exf4
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::B(A),XB(b)
    • Q(a);N_GUARD,P_SPINQ(a),XP(G)::B(A),XB(b)
    • S(c);N_GUARD::S(B),XB(d)
    • S(c);N_GUARD,XP(D)::S(B),XB(d)
    • S(c);N_GUARD,P_SPINS(c),XP(G)::S(B),XB(d)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(e);N_GUARD,S_CUTB(d),S_FLIGHT::QAR2(J)
      • Refutation
        • B(d);XS(B)
  • Actual
    • R(H);
    • Threat
      • R1(H),XP(g)
    • Vars
      • K(e);CHECK,N_GUARD,P-FLIGHT,XP(G)::R(E)+S(F),DCHECK
      • Q(a);N_GUARD,SBLOCK,XP(G)::B(A),XB(b)
      • B(d);N_GUARD,SBLOCK,XP(G)::S(B)
      • P(g);OGATEB,SBLOCK,XP(G)::QAR(J)
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