MESON Chess Problem Database

Problem Display
PID: 158626 (4K3/2p5/8/3k3N/1Q1N4/3P4/8/8 w - - 0 1)

Animitsa, Khristofor Savvich

Mat, 1983

4K3/2p5/8/3k3N/1Q1N4/3P4/8/8

#2

5 + 2

15148 Sadier Collection 2016
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qc5#
  • Tries
    • 1.Kd7?
      • 1...Ke5
        • 2.Qc5#
      • 1...c6
        • 2.Qd6#
      • 1...c5!
    • 1.Ke7?
      • 1...Ke5
        • 2.Qc5#
      • 1...c6
        • 2.Qd6#
      • 1...c5!
    • 1.Sb5?
      • 1...Ke5
        • 2.Qe4#
      • 1...Ke6
        • 2.Qe4#
      • 1...c6
        • 2.Qd6#
      • 1...c5
        • 2.Qe4#
      • 1...Kc6!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Qc5#
      • 1...Kd6!
  • Keys
    • 1.Sf5!
      • 1...Ke5
        • 2.Qe4#
      • 1...Kc6
        • 2.Se7#
      • 1...Ke6
        • 2.Qe4#
      • 1...c6
        • 2.Qd6#
      • 1...c5
        • 2.Qe4#

This anticipates 138717(2010)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • P(b);N_GUARD::QAR1(B)
      • Refutation
        • P(b);
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • P(b);N_GUARD::QAR1(B)
      • Refutation
        • P(b);
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAR2(B)
        • P(b);N_GUARD::QAR1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::S(C)
      • K(a);S_FLIGHT::QAR2(B)
      • P(b);N_GUARD::QAR1(B)
      • P(b);SBLOCK::QAB1(B)
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