MESON Chess Problem Database

Problem Display
PID: 72264 (8/8/6n1/8/8/3NB1p1/p5R1/Rq3k1K w - - 0 1)

Lipton, Michael

Chess, 1953

8/8/6n1/8/8/3NB1p1/p5R1/Rq3k1K

#2

5 + 5

14867 BCPS Library 2012
133 The Problemist Supplement 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Rxc1#
    • 1...Qd1
      • 2.Rxd1#
    • 1...Qe1
      • 2.Rxe1#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Rg1#
      • 1...Ke1
        • 2.Rg1#
      • 1...Sxf4!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Rg1#
      • 1...Ke1
        • 2.Rg1#
      • 1...Qxc1
        • 2.Rxc1#
      • 1...Qe4
        • 2.Sd3#
      • 1...Qb7
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);OGATE::R(A),XQ(a)
    • Q(a);OGATE::R1(A),XQ(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(C)
      • Vars
        • K(b);P-FLIGHT::R(C)
      • Refutation
        • S(e);XS(D)
  • Actual
    • S(D);N_PINQ(a)
    • Threat
      • R1(C)
    • Vars
      • K(b);P-FLIGHT::R(C)
      • Q(a);OGATE,P_SPINQ(a),XS(D)::R(A),XQ(a)
      • Q(a);P_PINR(C)::R(A)+S(D)
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