MESON Chess Problem Database

Problem Display
PID: 52481 (2R2bB1/8/pBr1p3/n1n5/1Pk2P2/2N5/N3K3/3Q4 w - - 0 1)

Sammelius, Carel Johan Robert

1st Prize, Het Belgisch Schaakbord (L'Echiquier Belge), 1986-1987

2R2bB1/8/pBr1p3/n1n5/1Pk2P2/2N5/N3K3/3Q4

#2

9 + 7

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Rxc5#
    • 1...Sb3
      • 2.Bxe6#
      • 2.Qd3#
    • 1...Sd3
      • 2.Bxe6#
    • 1...Sa4
      • 2.Bxe6#
    • 1...Se4
      • 2.Bxe6#
    • 1...Sb7
      • 2.Bxe6#
    • 1...Sd7
      • 2.Bxe6#
  • Tries
    • 1.Sb1?
      • threat
        • 2.Sa3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kb5!
    • 1.Bxe6+?
      • 1...Sxe6
        • 2.Qd5#
      • 1...Rxe6+!
    • 1.Qd3+?
      • 1...Sxd3
        • 2.Bxe6#
      • 1...Kb3!
  • Keys
    • 1.Qa4!
      • threat
        • 2.bxc5#
      • 1...Kd4
        • 2.bxa5#
      • 1...Rxb6
        • 2.b5#
      • 1...Sxa4
        • 2.Bxe6#
      • 1...Scb3
        • 2.Bxe6#
      • 1...Sd3
        • 2.Bxe6#
      • 1...Se4
        • 2.Bxe6#
      • 1...Scb7
        • 2.Bxe6#
      • 1...Sd7
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);OGATE,P_SPINS(c)::R1(H),XS(c)
    • S(c);N_GUARD,P_SPINR(e)::B(I),XP(f)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • S(c);N_GUARD,P_SPINR(e)::QAB1(A),XS(c)
      • Refutation
        • K(a);N_SPINP(f),S_FLIGHT
    • Try
      • B(I);CHECK,XP(f)
      • Vars
        • S(c);P_SPINR(e),XB(I)::QAB1(A)
      • Refutation
        • R(e);CHECK,P_SPINS(c),XB(I)
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);P_SPINR(e),XQ(A)::B(I),XP(f)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+P(E),XS(c)
    • Vars
      • K(a);N_SPINP(f),P-FLIGHT,P_SPINS(c)::QAR(A)+P(E),XS(b)
      • R(e);P_SPINS(c),XB(G)::QAR(A)+P(E)
      • S(c);N_GUARD,P_SPINR(e),XQ(A)::B(I),XP(f)
      • S(c);N_GUARD,P_SPINR(e)::B(I),XP(f)
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