MESON Chess Problem Database

Problem Display
PID: 214621 (8/8/8/8/3nK3/p2Q4/1k6/7R w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1973

8/8/8/8/3nK3/p2Q4/1k6/7R

#2

3 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka2
      • 2.Qb1#
  • Tries
    • 1.Rc1?
      • threat
        • 2.Qb1#
      • 1...Ka2
        • 2.Qb1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...a2
        • 2.Qc3#
      • 1...Kxc1!
    • 1.Qc3+?
      • 1...Ka2
        • 2.Ra1#
      • 1...Kxc3!
  • Keys
    • 1.Kxd4!
      • threat
        • 2.Qb1#
      • 1...Ka2
        • 2.Qb1#
        • 2.Qc2#
      • 1...a2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAB1(B)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
        • S(c);N_GUARD::QAR1(B),XS(c)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • K(C);P-FLIGHT,XS(c)
    • Threat
      • QAR1(B)
    • Vars
      • P(b);SBLOCK::QAB1(B)
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