MESON Chess Problem Database

Problem Display
PID: 266992 (5N2/8/1p3p2/2p2k2/4p2K/5N1p/2RB4/Q7 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

64 Shakhmatnoe obozrenie, 2022

5N2/8/1p3p2/2p2k2/4p2K/5N1p/2RB4/Q7

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Rxc5#
  • Tries
    • 1.Rc4?
      • 1...exf3
        • 2.Rf4#
      • 1...e3
        • 2.Qb1#
      • 1...b5
        • 2.Rxc5#
      • 1...h2!
    • 1.Qd4?
      • threat
        • 2.Qd5#
        • 2.Qd7#
      • 1...exf3
        • 2.Qf4#
        • 2.Qd5#
      • 1...e3
        • 2.Qg4#
      • 1...cxd4!
    • 1.Qb1?
      • 1...exf3
        • 2.Rxc5#
      • 1...e3
        • 2.Rc4#
      • 1...c4
        • 2.Qb5#
      • 1...b5
        • 2.Rxc5#
      • 1...h2!
    • 1.Qg1?
      • threat
        • 2.Qg4#
        • 2.Qg6#
      • 1...e3
        • 2.Qg4#
      • 1...exf3!
    • 1.Qa8?
      • threat
        • 2.Qd5#
        • 2.Qc8#
      • 1...exf3
        • 2.Qd5#
      • 1...e3!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qd7#
      • 1...exf3
        • 2.Qf4#
      • 1...e3
        • 2.Qg4#
      • 1...b5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD::R(B),XP(c)
  • Tries
    • Try
      • R(B);
      • Vars
        • P(b);OGATE,XS(D)::R1(B)
        • P(b);OGATEB::QAB(A)
        • P(e);N_GUARD::R(B),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE::QAB1(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);
      • Vars
        • P(b);XS(D)::QAB(A)+R(B),DCHECK,XP(c)
        • P(b);OGATEB::QAB(A)+R(B)
        • P(c);OGATEB::QAR(A)
        • P(e);N_GUARD::R(B),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(A)
      • Refutation
        • P(b);XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XS(D)::QAR2(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(b);OGATE,XS(D)::QAR1(A)
      • P(b);OGATE::QAB1(A)
      • P(e);N_GUARD::R(B),XP(c)
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