MESON Chess Problem Database

Problem Display
PID: 226429 (R6Q/ppq5/2pb2Bp/6pK/3B4/7p/k6r/1R6 w - - 0 1)

Nikitin, Aleksandr Olegovich

US Problem Bulletin, 1981

R6Q/ppq5/2pb2Bp/6pK/3B4/7p/k6r/1R6

#2

6 + 10

SOLUTION

  • SOUND
  • Tries
    • 1.Bc5?
      • threat
        • 2.Qa1#
      • 1...Rb2
        • 2.Qxb2#
      • 1...Qg7
        • 2.Rxa7#
      • 1...Be5!
    • 1.Bb6?
      • threat
        • 2.Qa1#
      • 1...Ka3
        • 2.Rxa7#
      • 1...Rb2
        • 2.Qxb2#
      • 1...Be5
        • 2.Rxa7#
      • 1...Qg7!
    • 1.Qg8+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Qf7!
  • Keys
    • 1.Bxa7!
      • threat
        • 2.Qa1#
      • 1...Ka3
        • 2.Bc5#
        • 2.Bb6#
      • 1...Rb2
        • 2.Qxb2#
      • 1...Qg7
        • 2.Bc5#
      • 1...Be5
        • 2.Bb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(F)
      • Vars
        • R(b);N_GUARD::QAR1(F),XR(b)
        • Q(j);N_GUARD::R(E),XP(h)
      • Refutation
        • B(f);
    • Try
      • B(B);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);P-FLIGHT::R(E),XP(h)
        • R(b);N_GUARD::QAR1(F),XR(b)
        • B(f);N_GUARD::R(E),XP(h)
      • Refutation
        • Q(j);
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • Q(j);P_PINB(D),P_SPINQ(j)
  • Actual
    • B(B);XP(h)
    • Threat
      • QAR1(F)
    • Vars
      • R(b);N_GUARD::QAR1(F),XR(b)
      • Q(j);N_GUARD::R(E)+B(B)
      • B(f);N_GUARD::R(E)+B(B)
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