MESON Chess Problem Database

Problem Display
PID: 225154 (4B3/7R/1b6/k2N2Q1/8/8/K7/8 w - - 0 1)

Baja, Victor

Chess Life & Review, 1977

4B3/7R/1b6/k2N2Q1/8/8/K7/8

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Sb4#
    • 1...Ba7
      • 2.Rxa7#
    • 1...Bd8
      • 2.Ra7#
  • Tries
    • 1.Sb4+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kxb4!
    • 1.Sxb6+?
      • 1...Ka6
        • 2.Qb5#
      • 1...Kxb6
        • 2.Qb5#
      • 1...Kb4!
    • 1.Sc7+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kb4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Ra7#
        • 2.Qxb6#
      • 1...Ka6
        • 2.Qxb6#
      • 1...Bxd8
        • 2.Ra7#
      • 1...Bc7
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::S(B)
    • B(b);N_GUARD::R(D),XB(b)
    • B(b);N_GUARD::R(D)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(C),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • S(B);CHECK,XB(b)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT,XS(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(C),XB(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);P_PINB(b)
    • Threat
      • DUALS(2)
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT::QAR1(C),XB(b)
      • B(b);N_SPINB(b),XQ(C)::R(D)
      • B(b);N_GUARD::QAR(C)
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