MESON Chess Problem Database

Problem Display
PID: 234490 (8/8/K3R3/3p4/2pk4/3P4/2Q5/8 w - - 0 1)

Makaronets, Leonid

ChessStar, 2020

8/8/K3R3/3p4/2pk4/3P4/2Q5/8

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kb5?
      • 1...cxd3
        • 2.Qb2#
        • 2.Qc5#
      • 1...c3!
    • 1.Kb6?
      • 1...cxd3
        • 2.Qc5#
      • 1...c3!
    • 1.Qc3+?
      • 1...Kc5
        • 2.d4#
      • 1...Kxc3!
  • Keys
    • 1.Qd2!
      • 1...Kc5
        • 2.d4#
      • 1...cxd3
        • 2.Qb4#
      • 1...c3
        • 2.Qe3#

Anticipated by 39779(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Refutation
        • P(a);
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(a);OGATE,SBLOCK,XP(B)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(a),S_FLIGHT::P(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);OGATE,S_FLIGHT::P(B)
      • P(a);OGATEB,P_SPINP(a),SBLOCK,XP(B)::QAR2(A)
      • P(a);SBLOCK::QAB1(A)
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