MESON Chess Problem Database

Problem Display
PID: 235393 (1bq5/4Q3/1p2P1pp/1Rn1k3/2BpP2R/B2PN1K1/4b3/8 w - - 0 1)

Paslack, Rainer

Schach-Aktiv, 2009

1bq5/4Q3/1p2P1pp/1Rn1k3/2BpP2R/B2PN1K1/4b3/8

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Qxe6#
    • 1...Qd7
      • 2.exd7#
    • 1...Bf1
      • 2.Sg4#
    • 1...Bg4
      • 2.Sxg4#
    • 1...Bd6
      • 2.Qg7#
    • 1...dxe3
      • 2.Bb2#
  • Tries
    • 1.Ba2?
      • threat
        • 2.Sc4#
      • 1...dxe3
        • 2.Bb2#
      • 1...Bxd3!
    • 1.Bb3?
      • threat
        • 2.Sc4#
      • 1...dxe3
        • 2.Bb2#
      • 1...Bxd3!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Sc4#
      • 1...Sxe4+
        • 2.Rxe4#
      • 1...Bxd3
        • 2.Sg4#
      • 1...Sxd3
        • 2.Qg7#
      • 1...Sxe6
        • 2.Bc6#
      • 1...dxe3
        • 2.Bb2#
      • 1...Sb3
        • 2.Qg7#
      • 1...Sa4
        • 2.Qg7#
      • 1...Sa6
        • 2.Qg7#
      • 1...Sb7
        • 2.Qg7#
      • 1...Sd7
        • 2.exd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • Q(i);OGATE,P_SPINQ(i),XP(I)::QAR1(J),XQ(i)
    • Q(i);OGATE::QAR(J)+P(I),XQ(i)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • B(h);SBLOCK::QAB(J)
    • P(b);OGATEB,XS(C)::B(A)
  • Tries
    • Try
      • B(E);
      • Threat
        • S(C)
      • Vars
        • P(b);OGATEB,XS(C)::B(A)
      • Refutation
        • B(a);XP(B)
    • Try
      • B(E);
      • Threat
        • S(C)
      • Vars
        • P(b);OGATEB,XS(C)::B(A)
      • Refutation
        • B(a);XP(B)
  • Actual
    • B(E);N_PINS(c)
    • Threat
      • S(C)
    • Vars
      • S(c);CHECK,OGATE,XP(F)::R1(G),XS(c)
      • B(a);N_GUARD,XP(B)::S(C)
      • S(c);XP(B)::QAB(J)
      • S(c);OGATEB,P_SPINS(c),XP(I)::R(H)+B(E)
      • P(b);OGATEB,XS(C)::B(A)
      • S(c);::QAB(J)
      • S(c);OGATE::QAR(J)+P(I),XS(c)
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