MESON Chess Problem Database

Problem Display
PID: 124382 (b2qr3/BB6/6N1/3p1pPQ/4N1n1/5kP1/3R1P1n/3K2R1 w - - 0 1)

Schead, A

Schead, Demetrio

Diario de Noticias, 1933

b2qr3/BB6/6N1/3p1pPQ/4N1n1/5kP1/3R1P1n/3K2R1

#2

11 + 8

1626 Northwest Chess 1975
783 Sinfonie Scacchistiche 1975
118 Szachy 1975
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg5
      • 2.Sxg5#
    • 1...Rxe4
      • 2.Sh4#
    • 1...Sf1
      • 2.Qh1#
    • 1...dxe4
      • 2.Sh4#
    • 1...d4
      • 2.Sh4#
      • 2.Rd3#
    • 1...fxe4
      • 2.Sh4#
  • Tries
    • 1.Re2?
      • threat
        • 2.Sd2#
        • 2.Sh4#
        • 2.Re3#
      • 1...Qxg5
        • 2.Sxg5#
      • 1...Rxe4
        • 2.Sh4#
      • 1...fxe4
        • 2.Sh4#
      • 1...Qa5
        • 2.Sh4#
        • 2.Re3#
      • 1...Qb6
        • 2.Sd2#
        • 2.Sh4#
      • 1...Sf1
        • 2.Sh4#
        • 2.Qh1#
      • 1...d4
        • 2.Sd2#
        • 2.Sh4#
      • 1...f4
        • 2.Sd2#
        • 2.Sh4#
      • 1...dxe4+!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Sd2#
      • 1...Kxe4
        • 2.Rd4#
      • 1...Qxg5
        • 2.Sxg5#
      • 1...Rxe4
        • 2.Sh4#
      • 1...fxe4
        • 2.Sh4#
      • 1...Qa5
        • 2.Rd3#
      • 1...Qb6
        • 2.Rxf5#
      • 1...Sf1
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(g);XP(G)::S(F),XQ(g)
    • R(h);SBLOCK,XS(F)::S(I)
    • S(a);OGATE::QAB(H)
    • P(d);P_PINR(C),P_SPINP(d),XS(F)::S(I)
    • P(e);SBLOCK,XS(F)::S(I)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(3)
      • Vars
        • Q(g);XP(G)::S(F),XQ(g)
        • R(h);XS(F)::S(I)
        • P(e);XS(F)::S(I)
      • Refutation
        • P(d);CHECK,P_SPINP(d),XS(F)
  • Actual
    • R(C);P_SPINR(C),XP(d)
    • Threat
      • S(F)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT,XS(F)::B(K)+R(C),DCHECK
      • Q(g);N_PINR(C),XP(G)::S(F),XQ(g)
      • R(h);SBLOCK,XS(F)::S(I)
      • P(e);SBLOCK,XS(F)::S(I)
      • Q(g);N_GUARD,N_PINR(C)::R(C)
      • Q(g);N_PINR(C)::R(C),XP(e)
      • S(a);OGATE::QAB(H)
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