MESON Chess Problem Database

Problem Display
PID: 172283 (4Qn2/8/8/5K2/6pk/7p/7R/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

4Qn2/8/8/5K2/6pk/7p/7R/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qe7+?
      • 1...Kh5
        • 2.Qg5#
      • 1...Kg3!
    • 1.Qd8+?
      • 1...Kh5
        • 2.Qg5#
      • 1...Kg3!
    • 1.Qxf8?
      • 1...Kh5
        • 2.Qh8#
      • 1...g3
        • 2.Qh6#
        • 2.Qh8#
      • 1...Kg3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxg4#
      • 1...Kg3
        • 2.Qf2#
      • 1...Kh5
        • 2.Rxh3#
      • 1...g3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT
    • Try
      • Q(C);XS(d)
      • Vars
        • K(c);P-FLIGHT::QAR(C)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(b)
    • Vars
      • K(c);N_SPINP(a),S_FLIGHT::QAB1(C)
      • K(c);P-FLIGHT::R(A),XP(a)
      • P(b);::QAR1(C)
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