MESON Chess Problem Database

Problem Display
PID: 247470 (B7/p2p2P1/3B1p2/q2N3K/R2rk3/2Pr2p1/2PPN1p1/3bQ3 w - - 0 1)

Easter, Norris

British Chess Magazine, 1931

B7/p2p2P1/3B1p2/q2N3K/R2rk3/2Pr2p1/2PPN1p1/3bQ3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sg1#
    • 1...Rf3
      • 2.Sxg3#
    • 1...f5
      • 2.Sf6#
  • Keys
    • 1.g8Q!
      • threat
        • 2.Qg4#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Kf3
        • 2.Sg1#
      • 1...Kf5
        • 2.Se7#
      • 1...Rf3
        • 2.Sxg3#
      • 1...f5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(f);N_PINS(D),N_SPINR(e),P_PINS(G),S_FLIGHT::S(D)
    • R(c);N_PINS(D),P_PINS(G),SBLOCK::QAR(A)+S(D),DCHECK,XP(d)
    • P(h);SBLOCK::B(K)+S(G),DCHECK
  • Actual
    • P(J);
    • Threat
      • QAR2(J)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XS(G)::QAB1(J),XQ(g)
      • K(f);N_PINS(D),N_SPINR(e),P_PINS(G),S_FLIGHT::S(D)
      • K(f);N_SPINR(e),S_FLIGHT::S(G)
      • R(c);N_PINS(D),P_PINS(G),SBLOCK::QAR(A)+S(D),DCHECK,XP(d)
      • P(h);SBLOCK::B(K)+S(G),DCHECK
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