MESON Chess Problem Database

Problem Display
PID: 162436 (8/5QBK/5NB1/4Nq2/5k2/1R6/8/8 w - - 0 1)

Jefimovas, E

Sachmatija, 2010

8/5QBK/5NB1/4Nq2/5k2/1R6/8/8

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Se4#
    • 1...Qc2
      • 2.Se4#
    • 1...Qe4
      • 2.Sxe4#
    • 1...Qg5
      • 2.Sd5#
      • 2.Sh5#
    • 1...Qxf6
      • 2.Qxf6#
  • Tries
    • 1.Sd5+?
      • 1...Ke4
        • 2.Rb4#
      • 1...Kg5!
    • 1.Sh5+?
      • 1...Ke4
        • 2.Qc4#
      • 1...Kg5!
    • 1.Bh6+?
      • 1...Qg5
        • 2.Sfg4#
        • 2.Sfd7#
      • 1...Kxe5!
    • 1.Rf3+?
      • 1...Kxe5
        • 2.Qd5#
      • 1...Kg5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Qc4#
      • 1...Qxf7
        • 2.Rf3#
      • 1...Qf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(b);::QAR(E)+S(C)
    • Q(b);::QAR(E)+S(C),XQ(b)
    • Q(b);N_PINB(D),OGATE,P_SPINQ(b),XS(C)::QAR2(E),XQ(b)
  • Tries
    • Try
      • S(C);CHECK,P_PINQ(b)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);N_SPINQ(b),S_FLIGHT
    • Try
      • S(C);CHECK,P_PINQ(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);N_SPINQ(b),S_FLIGHT
    • Try
      • B(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);P_PINQ(b)
    • Threat
      • QAR1(E),XQ(b)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(E)
      • Q(b);N_PINB(D),N_SPINQ(b),P_PINB(F),XQ(E)::R1(A)
      • Q(b);N_PINB(D),OGATEB::QAR2(E),XQ(b)
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