MESON Chess Problem Database

Problem Display
PID: 85328 (8/8/4R3/8/N6K/8/4pk2/7Q w - - 0 1)

Zheltonozhko, Vladimir Ivanovich

64 Shakhmatnoe obozrenie, 1994

8/8/4R3/8/N6K/8/4pk2/7Q

#2

4 + 2

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kh3?
      • 1...e1Q
        • 2.Qg2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qg2#
      • 1...e1S!
    • 1.Qg2+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kxg2!
    • 1.Qg1+?
      • 1...Kf3
        • 2.Qg3#
      • 1...Kxg1!
    • 1.Qh2+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kf3
        • 2.Qg3#
      • 1...Kf1!
  • Keys
    • 1.Sb2!
      • threat
        • 2.Sd3#
      • 1...e1S
        • 2.Sd1#

Anticipated by 51831(1930)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(a);::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • P(a);N_GUARD::S(B)
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