MESON Chess Problem Database

Problem Display
PID: 179209 (8/7k/K5bN/8/4N3/8/1Q6/3R4 w - - 0 1)

Nikitin, Vladimir V

Phenix, 2015

8/7k/K5bN/8/4N3/8/1Q6/3R4

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sf5?
      • threat
        • 2.Qg7#
      • 1...Kg8
        • 2.Qg7#
      • 1...Bxf5!
    • 1.Rg1?
      • 1...Bxe4
        • 2.Qg7#
      • 1...Bf5
        • 2.Qg7#
      • 1...Bh5
        • 2.Qg7#
      • 1...Bf7
        • 2.Qg7#
      • 1...Be8
        • 2.Qg7#
      • 1...Kxh6!
    • 1.Rd6?
      • 1...Kxh6
        • 2.Qh8#
      • 1...Bf5
        • 2.Sg5#
      • 1...Bh5
        • 2.Sg5#
      • 1...Bf7
        • 2.Sg5#
      • 1...Be8
        • 2.Sg5#
      • 1...Bxe4!
  • Keys
    • 1.Qf6!
      • 1...Kxh6
        • 2.Rh1#
      • 1...Bxe4
        • 2.Rd7#
      • 1...Bf5
        • 2.Sg5#
      • 1...Bh5
        • 2.Sg5#
      • 1...Bf7
        • 2.Sg5#
      • 1...Be8
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • B(a);XS(E)
    • Try
      • R(A);
      • Vars
        • B(a);XS(C)::QAR1(B)
        • B(a);::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT,XS(E)
    • Try
      • R(A);
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a),XS(E)::QAR2(B)
        • B(a);::S(C)
      • Refutation
        • B(a);XS(C)
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINB(a),XS(E)::R(A)
      • B(a);N_GUARD,XS(C)::R(A)
      • B(a);::S(C)
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