MESON Chess Problem Database

Problem Display
PID: 267335 (8/6K1/2R2Q2/Pk6/8/8/1qBB4/1Rb5 w - - 0 1)

Neptaev, Nikolai I

Zadachi i Etyudi, 2012

8/6K1/2R2Q2/Pk6/8/8/1qBB4/1Rb5

#2

7 + 3

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Rc3?
      • threat
        • 2.Qb6#
      • 1...Kb4
        • 2.Qb6#
      • 1...Kxa5
        • 2.Rc5#
      • 1...Qb3!
    • 1.Rc7?
      • 1...Qxb1
        • 2.Qf1#
        • 2.Qb6#
        • 2.Qc6#
      • 1...Qb3
        • 2.Qc6#
      • 1...Qb4
        • 2.Qb6#
      • 1...Bxd2!
    • 1.Rc8?
      • 1...Qxb1
        • 2.Qf1#
        • 2.Qb6#
        • 2.Qc6#
      • 1...Qb3
        • 2.Qc6#
      • 1...Qb4
        • 2.Qb6#
      • 1...Bxd2!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Rb6#
      • 1...Qb3
        • 2.Qc4#
      • 1...Qb4
        • 2.Qc5#

Anticipated by 161907(2009)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);N_SPINQ(F)
      • Threat
        • QAR1(F)
      • Vars
        • K(c);P-FLIGHT::QAR2(F)
        • K(c);N_GUARD,N_SPINQ(b),P-FLIGHT,XP(D)::B(C)+R(E),DCHECK
      • Refutation
        • Q(b);
    • Try
      • R(E);
      • Vars
        • Q(b);N_PINQ(F)::QAB1(F)
        • Q(b);N_PINQ(F)::QAR1(F)
      • Refutation
        • B(a);XB(C)
    • Try
      • R(E);
      • Vars
        • Q(b);N_PINQ(F)::QAB1(F)
        • Q(b);N_PINQ(F)::QAR1(F)
      • Refutation
        • B(a);XB(C)
  • Actual
    • Q(F);
    • Threat
      • R1(E)
    • Vars
      • Q(b);N_PINQ(F)::QAB1(F)
      • Q(b);N_PINQ(F)::QAR1(F)
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