MESON Chess Problem Database

Problem Display
PID: 275369 (2R5/2b4Q/5BK1/n1q1N3/8/PPk1P2R/1p1p4/1rnB4 w - - 0 1)

Easter, Norris

British Chess Magazine, 1935

2R5/2b4Q/5BK1/n1q1N3/8/PPk1P2R/1p1p4/1rnB4

#2

10 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Kg5?
      • threat
        • 2.Qc2#
      • 1...Qxe5+
        • 2.Bxe5#
      • 1...Qxa3
        • 2.Sd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Qxe3+!
  • Keys
    • 1.Kh5!
      • threat
        • 2.Qc2#
      • 1...Qxe5+
        • 2.Bxe5#
      • 1...Qxa3
        • 2.Sd3#
      • 1...Qxe3
        • 2.Sg4#
        • 2.Sd7#
        • 2.Sf7#
      • 1...Sd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(H);P-FLIGHT,P_SPINS(F)
      • Threat
        • QAR1(I)
      • Vars
        • Q(g);CHECK,OGATE,P_SPINB(h),P_SPINQ(g),XS(F)::B(G),XQ(g)
        • Q(g);N_PINS(F),P_SPINB(h),XP(B)::B(G)+S(F)
        • S(b);N_GUARD::QAR1(I),XS(b)
      • Refutation
        • Q(g);CHECK,N_PINS(F),P_SPINB(h),P_SPINQ(g),XP(D)
  • Actual
    • K(H);P_SPINS(F),S_FLIGHT
    • Threat
      • QAR1(I)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINB(h),P_SPINQ(g),XS(F)::B(G),XQ(g)
      • Q(g);N_PINS(F),P_SPINB(h),XP(B)::B(G)+S(F)
      • S(b);N_GUARD::QAR1(I),XS(b)
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