MESON Chess Problem Database

Problem Display
PID: 163268 (8/8/6K1/1Q1pk1N1/4N3/8/8/8 w - - 0 1)

Parcerisa, Jose Antonio Lopez

British Chess Magazine, 2017

8/8/6K1/1Q1pk1N1/4N3/8/8/8

#2

4 + 2

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qa5?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4!
  • Keys
    • 1.Se6!
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kxe6
        • 2.Qe8#

Anticipated by 56675(1923), 157070(1955), 10797(1968), 173964(2005), 164630(2014)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(b);N_SPINP(a),OGATEB,P-FLIGHT,XS(A)::QAR2(B)
      • K(b);N_SPINP(a),OGATEB,P-FLIGHT,XS(C)::QAR2(B)
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