MESON Chess Problem Database

Problem Display
PID: 12237 (2N5/3p4/B1br1p2/2k5/1r1p3K/BP6/4NQ2/8 w - - 0 1)

Gooderson, Arthur R

The Problemist, 1976

2N5/3p4/B1br1p2/2k5/1r1p3K/BP6/4NQ2/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qf5#
    • 1...Re6
      • 2.Qxd4#
  • Tries
    • 1.Bxb4+?
      • 1...Kd5
        • 2.Qf5#
      • 1...Kxb4!
    • 1.Qf5+?
      • 1...Rd5
        • 2.Qc2#
      • 1...Bd5!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qxd6#
      • 1...Kd5
        • 2.Qf5#
      • 1...Rd5
        • 2.Qc1#
      • 1...Re6
        • 2.Qxd4#
      • 1...d3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(b),N_SPINR(a),P-FLIGHT::QAR2(B)
    • R(e);N_GUARD::QAB1(B),XP(b)
  • Tries
    • Try
      • B(C);CHECK,XR(a)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(B)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XB(C)
    • Try
      • Q(B);CHECK,N_PINP(b)
      • Vars
        • R(e);SBLOCK::QAR(B)
      • Refutation
        • B(d);P_SPINB(d)
  • Actual
    • Q(B);N_PINP(b)
    • Threat
      • QAB1(B),XR(e)
    • Vars
      • K(c);N_SPINR(a),P-FLIGHT::QAR2(B)
      • R(e);SBLOCK::QAR(B)
      • R(e);N_GUARD::QAB1(B),XP(b)
      • P(b);OGATE,P_PINQ(B)::QAR1(B)
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