MESON Chess Problem Database

Problem Display
PID: 177471 (K1b5/1pp1R3/3k1N2/PB6/8/2n1Q3/7b/B7 w - - 0 1)

Shifrin, Semion

1st Comm., Sachova skladba, 2008

K1b5/1pp1R3/3k1N2/PB6/8/2n1Q3/7b/B7

#2

7 + 6

3485 Sachova skladba 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Be6
      • 2.Rxe6#
    • 1...Bd7
      • 2.Rxd7#
    • 1...Sd5
      • 2.Se8#
  • Tries
    • 1.Re8?
      • threat
        • 2.Qe7#
      • 1...Be5
        • 2.Qxe5#
      • 1...Be6
        • 2.Rxe6#
      • 1...Se4
        • 2.Qd4#
      • 1...Sd5
        • 2.Se4#
      • 1...Sxb5!
  • Keys
    • 1.Rxc7!
      • threat
        • 2.Qe7#
      • 1...Kxc7
        • 2.Qb6#
      • 1...Be5
        • 2.Qb6#
      • 1...Se4
        • 2.Qb6#
      • 1...Be6
        • 2.Qc5#
      • 1...Bd7
        • 2.Rxd7#
      • 1...Sd5
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • B(f);N_GUARD::R1(F),XB(f)
    • S(b);SBLOCK::S(E)
  • Tries
    • Try
      • R(F);
      • Threat
        • QAB1(B)
      • Vars
        • B(a);N_GUARD::QAB1(B),XB(a)
        • B(f);N_GUARD::R1(F),XB(f)
        • S(b);N_GUARD::QAR2(B)
        • S(b);N_GUARD,SBLOCK::S(E)
      • Refutation
        • S(b);XB(D)
  • Actual
    • R(F);XP(e)
    • Threat
      • QAB1(B)
    • Vars
      • K(c);S_FLIGHT,XR(F)::QAB1(B)
      • B(a);SBLOCK::QAR2(B)
      • S(b);::QAR2(B)
      • B(f);SBLOCK::QAB1(B)
      • B(f);N_GUARD::R1(F),XB(f)
      • S(b);SBLOCK::S(E)
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