MESON Chess Problem Database

Problem Display
PID: 244692 (8/8/8/8/8/4KN1P/6kp/4QR2 w - - 0 1)

Chistyakov, Nikolay

Kudesnik, 2006

8/8/8/8/8/4KN1P/6kp/4QR2

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rf2+?
      • 1...Kg3
        • 2.Rxh2#
      • 1...Kxh3!
    • 1.Qd2+?
      • 1...Kxf1
        • 2.Qe2#
        • 2.Qf2#
      • 1...Kg3
        • 2.Qxh2#
      • 1...Kxh3!
    • 1.Qg3+?
      • 1...Kxf1
        • 2.Sd2#
        • 2.Sxh2#
        • 2.Qf2#
      • 1...Kxg3!
    • 1.Qe2+?
      • 1...Kg3
        • 2.Qxh2#
      • 1...Kxh3!
  • Keys
    • 1.Qh4!
      • 1...Kxf1
        • 2.Qf2#
      • 1...h1Q
        • 2.Rf2#
      • 1...h1S
        • 2.Rg1#
      • 1...h1B
        • 2.Rg1#
        • 2.Rf2#
      • 1...h1R
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB(A)+R(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(E)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(E)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR1(A)
      • P(b);SBLOCK::R1(B)
      • P(b);N_GUARD::R1(B)
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