MESON Chess Problem Database

Problem Display
PID: 103315 (2q5/R6p/8/1k1B1p2/3P4/1p6/R6Q/6nK w - - 0 1)

Maximov, Nikolai J

Bollettino Ufficiale FSI, 1923-1926

2q5/R6p/8/1k1B1p2/3P4/1p6/R6Q/6nK

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Rxb7#
    • 1...Qc1
      • 2.Rb7#
      • 2.Qb8#
    • 1...Qc2
      • 2.Rb7#
      • 2.Qb8#
    • 1...Qc3
      • 2.Rb7#
      • 2.Qb8#
    • 1...Qc4
      • 2.Rb7#
      • 2.Qb8#
    • 1...Qb8
      • 2.Qxb8#
    • 1...Qe8
      • 2.Rb7#
    • 1...Qf8
      • 2.Rb7#
    • 1...Qg8
      • 2.Rb7#
    • 1...Qh8
      • 2.Rb7#
    • 1...bxa2
      • 2.Qb2#
    • 1...b2
      • 2.Rxb2#
      • 2.Qxb2#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qa5#
      • 1...Kb4
        • 2.Qa5#
      • 1...Qa6
        • 2.Qc5#
      • 1...Qd8
        • 2.Rb7#
        • 2.Qc5#
      • 1...Qxc7!
    • 1.Qb8+?
      • 1...Qb7
        • 2.Rxb7#
        • 2.Qxb7#
      • 1...Qxb8!
    • 1.Qb2?
      • threat
        • 2.Qxb3#
      • 1...Kb4
        • 2.Qxb3#
      • 1...Kb6
        • 2.Qxb3#
      • 1...Qc2
        • 2.Rb7#
      • 1...Qc3
        • 2.Rb7#
      • 1...Qc4
        • 2.Rb7#
      • 1...Qf8
        • 2.Rb7#
      • 1...Qc5!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qxb3#
      • 1...Kb4
        • 2.Qxb3#
      • 1...Kb6
        • 2.Qxb3#
      • 1...Qxc2
        • 2.Rb7#
      • 1...bxa2
        • 2.Qb3#
        • 2.Qb2#
      • 1...bxc2
        • 2.Rb2#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qc3
        • 2.Rb7#
      • 1...Qc4
        • 2.Rb7#
      • 1...Qf8
        • 2.Rb7#
      • 1...b2
        • 2.Rxb2#
        • 2.Qb3#
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD,P_PINB(E)::R(F),XQ(f)
    • Q(f);N_GUARD::QAR(C),XQ(f)
    • Q(f);N_GUARD::R(F)
    • P(b);OGATEB,XR(B)::QAR(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(c);P-FLIGHT::QAB1(C)
        • Q(f);N_GUARD::QAR1(C)
      • Refutation
        • Q(f);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • Q(f);XQ(C)
    • Try
      • Q(C);P_PINP(b)
      • Threat
        • QAR2(C),XP(b)
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(b)
        • K(c);P-FLIGHT::QAR(C),XP(b)
        • Q(f);N_GUARD::R(F)
      • Refutation
        • Q(f);
  • Actual
    • Q(C);
    • Threat
      • QAR2(C),XP(b)
    • Vars
      • K(c);P-FLIGHT::QAR1(C),XP(b)
      • K(c);P-FLIGHT::QAR(C),XP(b)
      • Q(f);N_GUARD,XQ(C)::R(F)
      • P(b);OGATEB,XQ(C)::R(B)
      • Q(f);N_GUARD::QAR1(C),XQ(f)
      • Q(f);N_GUARD::R(F)
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