MESON Chess Problem Database

Problem Display
PID: 57447 (b2R4/1R6/8/3Q1KB1/5N2/5pN1/2BPqp2/r3k3 w - - 0 1)

Kapralos, Demetrius N

Chess Life, 1956

b2R4/1R6/8/3Q1KB1/5N2/5pN1/2BPqp2/r3k3

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sd3#
    • 1...Qd3+
      • 2.Sxd3#
    • 1...Qxd2
      • 2.Qxd2#
    • 1...Qe4+
      • 2.Qxe4#
    • 1...Qe5+
      • 2.Qxe5#
    • 1...Qe6+
      • 2.Qxe6#
    • 1...Qe7
      • 2.Sd3#
      • 2.Rxe7#
    • 1...Qe8
      • 2.Sd3#
      • 2.Rxe8#
  • Tries
    • 1.Rb1+?
      • 1...Qd1
        • 2.Sd3#
        • 2.Re8#
      • 1...Rxb1!
    • 1.Re7?
      • threat
        • 2.Sd3#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Qe6+
        • 2.Rxe6#
      • 1...Qe3
        • 2.Rxe3#
      • 1...Ra3!
    • 1.Qe5?
      • threat
        • 2.Sd3#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qe3
        • 2.Qxa1#
        • 2.Qxe3#
      • 1...Ra3
        • 2.Rb1#
      • 1...Qxe5+!
  • Keys
    • 1.Re8!
      • threat
        • 2.Sd3#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Qe6+
        • 2.Rxe6#
      • 1...Qe3
        • 2.Rxe3#
      • 1...Ra3
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::S(D)
    • Q(c);CHECK,N_GUARD::S(D),XQ(c)
    • Q(c);OGATE,XP(B)::QAB1(E),XQ(c)
    • Q(c);CHECK,OGATEB::QAR(E),XQ(c)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • R(a);XR(H)
    • Try
      • R(H);P_PINQ(c)
      • Threat
        • S(D)
      • Vars
        • Q(c);CHECK,OGATEB::R(H),XQ(c)
        • Q(c);OGATEB::R(H),XQ(c)
      • Refutation
        • R(a);
    • Try
      • Q(E);P_PINQ(c)
      • Threat
        • S(D)
      • Vars
        • Q(c);CHECK,OGATEB::QAR(E),XQ(c)
        • R(a);N_GUARD::R(H)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(E)
  • Actual
    • R(I);P_PINQ(c)
    • Threat
      • S(D)
    • Vars
      • Q(c);CHECK,OGATEB::R(I),XQ(c)
      • Q(c);OGATEB::R(I),XQ(c)
      • R(a);N_GUARD::R(H)
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