MESON Chess Problem Database

Problem Display
PID: 59532 (Q3R3/4n1r1/1p2b1r1/p2R1Nn1/2P1k1p1/6B1/3p3N/3K4 w - - 0 1)

Ellerman, Arnoldo

1st Prize, Brisbane Courier, 1922-1923

Q3R3/4n1r1/1p2b1r1/p2R1Nn1/2P1k1p1/6B1/3p3N/3K4

#2

8 + 10

56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qxd5#
    • 1...Sxd5
      • 2.Qxd5#
  • Tries
    • 1.Kxd2?
      • threat
        • 2.Sd6#
        • 2.Re5#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Bxf5
        • 2.Rd6#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sxf5
        • 2.Rd7#
      • 1...Bd7
        • 2.Re5#
      • 1...Bf7
        • 2.Re5#
      • 1...Bc8
        • 2.Re5#
      • 1...Bg8
        • 2.Re5#
      • 1...Sf7
        • 2.Re5#
      • 1...Sc8
        • 2.Re5#
      • 1...Sf3+!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Sxd2#
      • 1...Kf3
        • 2.Rd3#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Bxf5
        • 2.Rd6#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sxf5
        • 2.Rd7#
      • 1...Sf3
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(g);OGATE,P_SPINB(g),P_SPINS(i),XR(E)::QAB1(G),XB(g)
    • S(i);OGATE,P_SPINB(g),P_SPINS(i),XR(E)::QAB1(G),XS(i)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);OGATE,P_SPINB(g),P_SPINS(i),XR(E)::QAB1(G),XB(g)
        • B(g);N_GUARD,P_SPINS(i),SBLOCK,XS(F)::QAB(G)+R(E)
        • S(i);OGATE,P_SPINB(g),P_SPINS(i),XR(E)::QAB1(G),XS(i)
        • S(i);N_GUARD,P_SPINB(g),SBLOCK,XS(F)::QAB(G)+R(E)
        • B(g);P_SPINS(i)::QAB(G)+R(E),DCHECK
        • S(e);::QAB(G)+R(E),DCHECK
        • S(i);P_SPINB(g)::QAB(G)+R(E),DCHECK
      • Refutation
        • S(e);CHECK
  • Actual
    • S(B);
    • Threat
      • S(B),XP(a)
    • Vars
      • K(b);S_FLIGHT::QAB(G)+R(E),DCHECK
      • B(g);OGATE,P_SPINB(g),P_SPINS(i),XR(E)::QAB1(G),XB(g)
      • B(g);N_GUARD,P_SPINS(i),SBLOCK,XS(F)::QAB(G)+R(E)
      • S(i);OGATE,P_SPINB(g),P_SPINS(i),XR(E)::QAB1(G),XS(i)
      • S(i);N_GUARD,P_SPINB(g),SBLOCK,XS(F)::QAB(G)+R(E)
      • S(e);SBLOCK::S(F)
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