MESON Chess Problem Database

Problem Display
PID: 121684 (2br1n2/Rqpk1PN1/1b4n1/1N1B1PB1/4R3/7r/7p/3Q3K w - - 0 1)

Stocchi, Ottavio

Revista Romana de Sah, 1934

2br1n2/Rqpk1PN1/1b4n1/1N1B1PB1/4R3/7r/7p/3Q3K

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Qxd5#
    • 1...Qc6
      • 2.Be6#
    • 1...Re8
      • 2.fxe8Q#
      • 2.fxe8B#
    • 1...Sf4
      • 2.Re7#
    • 1...Sh4
      • 2.Re7#
    • 1...Se7
      • 2.Rxe7#
    • 1...Sh8
      • 2.Re7#
    • 1...Se6
      • 2.fxe6#
    • 1...c6
      • 2.Be6#
  • Tries
    • 1.Bxb7+?
      • 1...Bd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Rd3!
  • Keys
    • 1.Re8!
      • threat
        • 2.Rxd8#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Rxe8
        • 2.fxe8Q#
        • 2.fxe8B#
      • 1...Se7
        • 2.Rxe7#
      • 1...Se6
        • 2.fxe6#
      • 1...c5
        • 2.Bf3#
      • 1...c6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(e);OGATE,P_PINR(C),P_SPINP(f),P_SPINQ(e),XB(E)::QAR2(A),XQ(e)
    • Q(e);P_SPINP(f),SBLOCK::QAR(A)+B(E),DCHECK
    • R(i);OGATE::PXR(i)=Q
    • S(d);N_GUARD::R1(C)
    • S(d);N_GUARD::R1(C),XS(d)
    • S(j);OGATE::P(F),XS(j)
    • P(f);P_SPINQ(e),SBLOCK::QAR(A)+B(E),DCHECK
  • Tries
    • Try
      • B(E);CHECK,XQ(e)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • R(C);P_SPINB(E)
    • Threat
      • R1(C),XR(i)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINP(f),P_SPINQ(e),XB(E)::QAR2(A),XQ(e)
      • R(i);OGATE,XR(C)::PXR(i)=Q
      • S(d);N_GUARD::R1(C),XS(d)
      • S(j);OGATE::P(F),XS(j)
      • P(f);P_SPINQ(e),S_CUTB(c)::QAR(A)+B(E)
      • P(f);N_PINB(E),P_SPINQ(e),SBLOCK::QAR(A)+B(E),DCHECK
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