MESON Chess Problem Database

Problem Display
PID: 139047 (2BB4/3N4/2p3pp/1bK2Prp/4RnkP/8/4n2P/3Q2N1 w - - 0 1)

Gill, JR

The Problemist, 1937

2BB4/3N4/2p3pp/1bK2Prp/4RnkP/8/4n2P/3Q2N1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5+
      • 2.Se5#
  • Tries
    • 1.Qxe2+?
      • 1...Kxh4
        • 2.Rxf4#
      • 1...Kxf5
        • 2.Re5#
      • 1...Bxe2!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qh3#
      • 1...Rxf5+
        • 2.Se5#
      • 1...Kxh4
        • 2.Qh3#
      • 1...Kxf5
        • 2.Sf6#
      • 1...Sxg1
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,XP(G)::S(H)
  • Tries
    • Try
      • Q(A);CHECK,P_PINS(b),XS(a)
      • Vars
        • K(c);P-FLIGHT,P_SPINR(e),XP(E)::R(D),XS(b)
        • K(c);N_SPINS(b),S_FLIGHT,XP(G)::R1(D)
      • Refutation
        • B(d);XQ(A)
  • Actual
    • Q(A);N_PINS(a),P_PINS(b)
    • Threat
      • QAB1(A)
    • Vars
      • R(e);CHECK,XP(G)::S(H)
      • K(c);P-FLIGHT,P_SPINR(e),XP(E)::QAR1(A)
      • K(c);S_FLIGHT,XP(G)::B(I)+S(H)
      • S(a);N_GUARD,XS(B)::R1(D),XS(b)
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