MESON Chess Problem Database

Problem Display
PID: 89095 (4R3/8/8/5Q2/5np1/5k2/8/4K2R w - - 0 1)

Rice, John Michael

The Problemist, 1991

4R3/8/8/5Q2/5np1/5k2/8/4K2R

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kf1?
      • 1...Kg3
        • 2.Re3#
      • 1...g3!
    • 1.Re2?
      • 1...g3
        • 2.Rf1#
      • 1...Kg3!
    • 1.Re3+?
      • 1...Kg2
        • 2.Qe4#
      • 1...Kxe3!
    • 1.Qd5+?
      • 1...Kg3
        • 2.Re3#
      • 1...Sxd5!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Qxg4#
      • 1...Kg2
        • 2.Qxg4#
      • 1...Kg3
        • 2.Qxg4#
      • 1...g3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::R(D)
      • Refutation
        • P(c);
    • Try
      • R(D);
      • Vars
        • P(c);SBLOCK::R(B)
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT,XR(D)
    • Try
      • Q(C);CHECK,N_PINS(b)
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • S(b);XQ(C)
  • Actual
    • R(B);
    • Threat
      • QAB1(C),XP(c)
    • Vars
      • K(a);N_SPINS(b),S_FLIGHT::QAR2(C),XP(c)
      • K(a);N_SPINS(b),P-FLIGHT::QAR1(C),XP(c)
      • P(c);SBLOCK::QAB1(C)
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