MESON Chess Problem Database

Problem Display
PID: 241306 (1n6/Q2q4/1R6/2k5/P3K2n/2PBN3/1N3R2/8 w - - 0 1)

Gavrilov, Constantin Grigorievich

Revista Romana de Sah, 1926

1n6/Q2q4/1R6/2k5/P3K2n/2PBN3/1N3R2/8

#2

9 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Ra6#
      • 2.Re6#
      • 2.Rbf6#
      • 2.Rg6#
      • 2.Rh6#
      • 2.Qa5#
    • 1...Qxa4+
      • 2.Sxa4#
    • 1...Qe6+
      • 2.Rxe6#
    • 1...Qc8
      • 2.Ra6#
      • 2.Re6#
      • 2.Rbf6#
      • 2.Rg6#
      • 2.Rh6#
      • 2.Qa5#
    • 1...Qe8+
      • 2.Re6#
    • 1...Qxd3+
      • 2.Sxd3#
    • 1...Qd4+
      • 2.cxd4#
    • 1...Qd6
      • 2.Qa5#
    • 1...Qc7
      • 2.Qa5#
    • 1...Qf7
      • 2.Qa5#
    • 1...Qg7
      • 2.Qa5#
    • 1...Qd8
      • 2.Qa5#
  • Tries
    • 1.Rb5+?
      • 1...Kc6
        • 2.Qc5#
        • 2.Qb6#
      • 1...Kd6!
    • 1.Rb7+?
      • 1...Kc6
        • 2.Qb6#
      • 1...Kd6!
  • Keys
    • 1.Qa5+!
      • 1...Qb5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(c);CHECK,XP(F)::S(A),XQ(c)
    • Q(c);CHECK,N_GUARD::QAB(I)+R(H),XQ(c)
    • Q(c);CHECK,N_GUARD::QAB(I)+R(H)
    • Q(c);CHECK,XB(D)::S(A),XQ(c)
    • Q(c);CHECK,OGATE::P(C),XQ(c)
    • Q(c);N_GUARD::QAR2(I)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(I)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(I);CHECK
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c)::QAR1(I),XQ(c)
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