MESON Chess Problem Database

Problem Display
PID: 168923 (8/8/6p1/1p5k/6N1/1P4K1/Q7/8 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

SuperProblem, 2014

8/8/6p1/1p5k/6N1/1P4K1/Q7/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kf4?
      • threat
        • 2.Qh2#
      • 1...Kh4
        • 2.Qh2#
      • 1...g5+!
    • 1.Qc2?
      • 1...Kg5
        • 2.Qc5#
      • 1...g5
        • 2.Qh7#
      • 1...b4!
    • 1.Qe2?
      • 1...Kg5
        • 2.Qxb5#
        • 2.Qe5#
      • 1...g5
        • 2.Qe8#
      • 1...b4!
    • 1.Qf2?
      • 1...Kg5
        • 2.Qc5#
      • 1...g5
        • 2.Qf7#
      • 1...b4!
    • 1.Qa5?
      • 1...Kg5
        • 2.Qxb5#
      • 1...g5!
    • 1.Qa6?
      • 1...Kg5
        • 2.Qxb5#
      • 1...g5
        • 2.Qh6#
      • 1...b4!
    • 1.Qa7?
      • 1...Kg5
        • 2.Qc5#
      • 1...g5
        • 2.Qf7#
        • 2.Qh7#
      • 1...b4!
    • 1.Qa8?
      • 1...Kg5
        • 2.Qd5#
      • 1...g5
        • 2.Qe8#
      • 1...b4!
  • Keys
    • 1.b4!
      • 1...Kg5
        • 2.Qd5#
      • 1...g5
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • P(c);OGATE,SBLOCK::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);P-FLIGHT::QAR(A),XP(a)
      • Refutation
        • P(c);N_SPINP(a)
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR(A),XP(a)
        • P(c);OGATE::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(a);
  • Actual
    • P(B);
    • Vars
      • K(b);P-FLIGHT::QAR(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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