MESON Chess Problem Database

Problem Display
PID: 142836 (2N4B/2p1Rp2/K3Br2/Qn2kP2/7R/b3NpP1/4q3/8 w - - 0 1)

Francey, James

7th Prize, Munkassakk, 1935

2N4B/2p1Rp2/K3Br2/Qn2kP2/7R/b3NpP1/4q3/8

#2

10 + 8

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sc4#
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qe1
      • 2.Sc4#
    • 1...Qb2
      • 2.Sc4#
    • 1...Qd2
      • 2.Sc4#
    • 1...Qf2
      • 2.Sc4#
    • 1...Qg2
      • 2.Sc4#
    • 1...Qh2
      • 2.Sc4#
    • 1...fxe6
      • 2.Rxe6#
  • Tries
    • 1.Qxc7+?
      • 1...Bd6
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Bd7#
        • 2.Bxf7#
      • 1...Sd6+
        • 2.Bc4#
      • 1...Sxc7+!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sc4#
      • 1...Sd6+
        • 2.Bc4#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...fxe6
        • 2.Rxe6#
      • 1...Qc4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD::S(A),XQ(a)
    • P(h);OGATE,P_SPINP(h),XB(G)::R1(H),XP(h)
  • Tries
    • Try
      • Q(D);CHECK,N_PINS(d),XP(g)
      • Vars
        • S(d);CHECK,N_PINB(G),P_SPINS(d)::R(H)+B(G)
      • Refutation
        • S(d);CHECK,XQ(D)
  • Actual
    • Q(D);N_PINS(d)
    • Threat
      • S(A)
    • Vars
      • S(d);CHECK,N_PINB(G)::R(H)+B(G)
      • Q(a);OGATE,P_SPINQ(a),XS(A)::QAR2(D),XQ(a)
      • P(h);OGATE,P_SPINP(h),XB(G)::R1(H),XP(h)
      • Q(a);::QAR(D)+S(A),DCHECK,XQ(a)
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