MESON Chess Problem Database

Problem Display
PID: 108496 (8/p6p/4p2P/5k2/3RpPNK/8/Q7/8 w - - 0 1)

Juk, Aleksandr I

Patriot Batkivshini, 1975

8/p6p/4p2P/5k2/3RpPNK/8/Q7/8

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Qf2#
    • 1...Kg6
      • 2.Qxe6#
    • 1...e3
      • 2.Qb1#
      • 2.Qc2#
    • 1...e5
      • 2.Qf7#
  • Tries
    • 1.Qd5+?
      • 1...Kxf4
        • 2.Qxe4#
      • 1...Kg6
        • 2.Qxe6#
        • 2.Qh5#
      • 1...e5
        • 2.Qf7#
      • 1...exd5!
    • 1.Qxe6+?
      • 1...Kxf4
        • 2.Qf7#
        • 2.Qxe4#
        • 2.Qf6#
      • 1...Kxe6!
    • 1.Qxa7?
      • threat
        • 2.Qf7#
      • 1...Kxf4
        • 2.Qf7#
      • 1...Kg6!
  • Keys
    • 1.Qa6!
      • 1...Kxf4
        • 2.Qf1#
      • 1...Kg6
        • 2.Qxe6#
      • 1...e3
        • 2.Qd3#
      • 1...e5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,P_SPINP(a),XP(C)::QAR2(A)
    • K(b);S_FLIGHT::QAR2(A),XP(c)
    • P(c);OGATE::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a),XP(C)::QAR1(A),XP(a)
        • P(c);OGATE,P_SPINP(c)::QAR2(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);XP(d)
      • Threat
        • QAR2(A)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a),XP(C)::QAR(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINP(a),XP(C)::QAR(A)
      • K(b);P_SPINP(c),S_FLIGHT::QAR2(A),XP(c)
      • P(a);OGATEB::QAB(A)
      • P(c);OGATE::QAR1(A)
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