MESON Chess Problem Database

Problem Display
PID: 276785 (7K/8/1b3p2/n7/2B1P1RP/Qq3k1P/3R2N1/7n w - - 0 1)

Mucha, Boris I

Stella Polaris, 1971

7K/8/1b3p2/n7/2B1P1RP/Qq3k1P/3R2N1/7n

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Se1#
    • 1...Bf2
      • 2.Be2#
    • 1...Be3
      • 2.Se1#
    • 1...Sf2
      • 2.Be2#
    • 1...Sg3
      • 2.Rf4#
  • Tries
    • 1.Bd5?
      • threat
        • 2.e5#
      • 1...Be3
        • 2.Se1#
      • 1...Sg3
        • 2.Rf4#
      • 1...Sf2!
    • 1.Qxb3+?
      • 1...Be3
        • 2.Se1#
        • 2.Qd1#
        • 2.Qxe3#
      • 1...Sxb3!
  • Keys
    • 1.e5!
      • threat
        • 2.Bd5#
      • 1...Sxc4
        • 2.Qa8#
      • 1...fxe5
        • 2.Qf8#
      • 1...Be3
        • 2.Se1#
      • 1...Sf2
        • 2.Be2#
      • 1...Sg3
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);::S(B)
    • B(e);SBLOCK::B(E)
    • B(e);N_SPINQ(b),SBLOCK::S(B)
    • S(a);SBLOCK::B(E)
    • S(a);SBLOCK::R1(G)
  • Tries
    • Try
      • B(E);
      • Threat
        • B(E)+P(F)
      • Vars
        • B(e);N_SPINQ(b),SBLOCK::S(B)
        • S(a);SBLOCK::R1(G)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK,XQ(b)
      • Refutation
        • S(d);XQ(C)
  • Actual
    • P(F);
    • Threat
      • B(E)
    • Vars
      • S(d);OGATE,XB(E)::QAB(C)
      • P(f);OGATEB,XP(F)::QAR(C)
      • B(e);N_SPINQ(b),SBLOCK::S(B)
      • S(a);SBLOCK::B(E)
      • S(a);SBLOCK::R1(G)
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