MESON Chess Problem Database

Problem Display
PID: 235000 (3KN3/7p/4k1p1/6R1/8/5N1P/6Q1/1b6 w - - 0 1)

Akimov, Nikolai Nikolaevich

64 Shakhmatnoe obozrenie, 2019

3KN3/7p/4k1p1/6R1/8/5N1P/6Q1/1b6

#2

6 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qxa2#
    • 1...Bf5
      • 2.Qa2#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Sd4#
        • 2.Qc4#
      • 1...Bf5
        • 2.Qc4#
      • 1...Ba2
        • 2.Sd4#
      • 1...Bd3
        • 2.Sd4#
      • 1...Be4
        • 2.Sd4#
      • 1...Kf7!
    • 1.Qb2?
      • threat
        • 2.Qf6#
        • 2.Qb3#
      • 1...Bf5
        • 2.Qa2#
        • 2.Qb3#
      • 1...Ba2
        • 2.Qf6#
        • 2.Qxa2#
      • 1...Bc2
        • 2.Qf6#
      • 1...Bd3
        • 2.Qf6#
      • 1...Be4
        • 2.Qf6#
      • 1...Kf7!
    • 1.Qf2?
      • threat
        • 2.Sd4#
      • 1...Bf5
        • 2.Qa2#
      • 1...Kf7!
    • 1.Qg4+?
      • 1...Bf5
        • 2.Qc4#
      • 1...Kf7!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Sd4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Bxf5
        • 2.Qa2#
      • 1...gxf5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(A),XB(a)
    • B(a);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB(A)
        • B(a);::S(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • B(a);N_GUARD::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • S(B)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • B(a);N_GUARD,SBLOCK,XR(D)::QAB(A)
      • P(c);OGATE,SBLOCK,XR(D)::QAB(A)
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