MESON Chess Problem Database

Problem Display
PID: 176444 (3R4/8/4N3/p1nN1p1n/3PkBp1/8/2P3P1/bQ2K3 w - - 0 1)

Groeneveld, Cornelis

Schach-Echo, 1982

3R4/8/4N3/p1nN1p1n/3PkBp1/8/2P3P1/bQ2K3

#2

9 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3+
      • 2.Sxc3#
    • 1...Bxd4
      • 2.Sg5#
    • 1...Sb3
      • 2.cxb3#
      • 2.c3#
      • 2.c4#
    • 1...Sd3+
      • 2.cxd3#
    • 1...Sa4
      • 2.c3#
      • 2.c4#
    • 1...Sa6
      • 2.c3#
      • 2.c4#
    • 1...Sxe6
      • 2.c3#
    • 1...Sb7
      • 2.c3#
      • 2.c4#
    • 1...Sd7
      • 2.c4#
    • 1...Sg3
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sg7
      • 2.Sf6#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Sxc5#
        • 2.Sg5#
        • 2.Qe2#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Sd3+
        • 2.Qxd3#
        • 2.cxd3#
      • 1...Bxd4
        • 2.Sg5#
        • 2.Qxd4#
      • 1...Sxe6
        • 2.Qd3#
      • 1...Sxf4
        • 2.Sxc5#
        • 2.Sg5#
      • 1...Sb3
        • 2.Sg5#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Sa4
        • 2.Sg5#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Sa6
        • 2.Sg5#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Sb7
        • 2.Sg5#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Sg3
        • 2.Sf6#
        • 2.Sxc5#
        • 2.Sg5#
      • 1...Sd7!
    • 1.dxc5?
      • threat
        • 2.c3#
        • 2.c4#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Sxf4!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Qe1#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Sb3+
        • 2.cxb3#
      • 1...Bxd4
        • 2.Sg5#
      • 1...Sxe6
        • 2.c3#
      • 1...Sxf4
        • 2.Sf6#
      • 1...Sd7
        • 2.c4#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sg3
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);CHECK,N_GUARD::S(G),XB(a)
    • B(a);SBLOCK,XP(E)::S(H)
    • S(e);CHECK,OGATE::P(C),XS(e)
    • S(e);N_GUARD,XS(H)::QAB(A)+P(C)
    • S(e);N_GUARD::QAB(A)+P(C)
    • S(g);N_GUARD::S(G)
    • S(g);N_GUARD::S(G),XS(g)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);CHECK,N_GUARD::S(G),XB(a)
        • S(e);N_GUARD,XS(H)::QAB1(A)
      • Refutation
        • S(e);
    • Try
      • P(E);XS(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);CHECK,N_GUARD::S(G),XB(a)
      • Refutation
        • S(g);XB(F)
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • QAR(A)
    • Vars
      • B(a);CHECK,N_GUARD::S(G),XB(a)
      • S(e);CHECK,OGATE::QAB(A)+P(C),XS(e)
      • B(a);SBLOCK,XP(E)::S(H)
      • S(e);N_GUARD,XS(H)::QAB(A)+P(C)
      • S(g);N_GUARD,XB(F)::S(G)
      • S(e);N_GUARD::QAB(A)+P(C)
      • S(e);OGATE::P(C),XS(e)
      • S(g);N_GUARD::S(G)
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