MESON Chess Problem Database

Problem Display
PID: 48686 (6b1/1B2Q3/1b2p1p1/1p2k1P1/3p1pp1/r3N3/4N3/4R1K1 w - - 0 1)

Haring, Jacobus

1st HM., Het Belgisch Schaakbord (L'Echiquier Belge), 1977-1978

6b1/1B2Q3/1b2p1p1/1p2k1P1/3p1pp1/r3N3/4N3/4R1K1

#2

7 + 10

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Ba5
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Ba7
      • 2.Qc7#
    • 1...Bc7
      • 2.Qc5#
      • 2.Qxc7#
    • 1...Bd8
      • 2.Qc5#
  • Tries
    • 1.Sc4+?
      • 1...Kf5
        • 2.Qf6#
      • 1...bxc4!
    • 1.Qf8?
      • threat
        • 2.Sxg4#
        • 2.Qxf4#
      • 1...Rxe3
        • 2.Qxf4#
      • 1...dxe3
        • 2.Qxf4#
      • 1...fxe3
        • 2.Qf4#
      • 1...d3
        • 2.Qxf4#
      • 1...f3
        • 2.Sxg4#
        • 2.Qf4#
      • 1...g3
        • 2.Sg4#
        • 2.Qxf4#
      • 1...Bf7!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qf6#
      • 1...Rg3+
        • 2.Sexg3#
      • 1...d3+
        • 2.Sed4#
      • 1...Kxf5
        • 2.Qf6#
      • 1...gxf5
        • 2.Sc3#
      • 1...Bd8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(g);N_GUARD::QAR2(G)
    • B(g);N_GUARD::QAR2(G),XB(g)
    • B(g);N_GUARD::QAB(G)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(f);N_SPINP(h),P-FLIGHT::QAR1(G)
      • Refutation
        • P(e);XS(D)
    • Try
      • Q(G);N_PINP(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XS(D)::QAB1(G),XP(c)
        • P(b);XS(D)::QAB1(G),XP(c)
        • P(c);XS(D)::QAB1(G)
        • P(b);P_PINS(D)::QAB1(G),XP(c)
      • Refutation
        • B(j);
  • Actual
    • S(D);
    • Threat
      • QAB1(G)
    • Vars
      • R(a);CHECK,N_GUARD::R(A)+S(C),XR(a)
      • P(b);CHECK,S_CUTR(a)::R(A)+S(C)
      • K(f);N_SPINP(h),P-FLIGHT,XS(D)::QAR1(G)
      • P(i);SBLOCK,XS(D)::R(A)+S(C)
      • B(g);N_GUARD::QAR2(G)
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