MESON Chess Problem Database

Problem Display
PID: 243621 (1q2NR2/2p1pPr1/2P1kb2/R3B2r/4B1pp/n7/5NQ1/1n5K w - - 0 1)

Balcu, Silviu

Revista Romana de Sah, 1955

1q2NR2/2p1pPr1/2P1kb2/R3B2r/4B1pp/n7/5NQ1/1n5K

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sxc7#
    • 1...Qb3
      • 2.Sxc7#
    • 1...Qb4
      • 2.Sxc7#
    • 1...Qa8
      • 2.Sxc7#
    • 1...Rg8
      • 2.fxg8Q#
      • 2.fxg8B#
    • 1...Bg5
      • 2.Sxg7#
      • 2.Qxg4#
  • Tries
    • 1.Bd5+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kf5!
    • 1.Bf5+?
      • 1...Rxf5
        • 2.Qd5#
      • 1...Kxf5!
    • 1.Qxg4+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.Qxf5#
      • 1...Rxg4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sf4#
      • 1...Bxe5
        • 2.Sc5#
      • 1...Qb5
        • 2.Sxc7#
      • 1...Rf5
        • 2.Bd5#
      • 1...Bg5
        • 2.Sxg7#
        • 2.Qxg4#
      • 1...Sb5
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(k);N_GUARD::S(I),XP(h)
    • R(j);OGATE::PXR(j)=Q
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(f);P-FLIGHT,XB(F)::QAR1(C)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • R(e);SBLOCK,XB(D)::QAB1(C)
      • Refutation
        • K(f);S_FLIGHT,XB(D)
    • Try
      • Q(C);CHECK,XP(c)
      • Refutation
        • R(j);XQ(C)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • B(g);SBLOCK,XB(F)::S(B)
      • Q(k);N_GUARD::S(I),XP(h)
      • R(e);SBLOCK::B(D)
      • S(b);N_GUARD,S_CUTQ(k)::QAB(C)
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