MESON Chess Problem Database

Problem Display
PID: 186260 (3Bnr2/3Pp1P1/r1p1p2R/1pKNkp2/Rp2Pp2/4N2b/6nQ/1B6 w - - 0 1)

Groeneveld, Cornelis

van Gool, Johann Christoffel

5th Comm., idee & form, 1990-1991

3Bnr2/3Pp1P1/r1p1p2R/1pKNkp2/Rp2Pp2/4N2b/6nQ/1B6

#2

11 + 13

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qxf4#
      • 2.Qb2#
    • 1...Sxe3
      • 2.Qxf4#
      • 2.Qb2#
    • 1...Sh4
      • 2.Qxf4#
      • 2.Qb2#
    • 1...Sf6
      • 2.Bc7#
    • 1...Sc7
      • 2.Bxc7#
    • 1...Sxg7
      • 2.Bc7#
    • 1...bxa4
      • 2.Sc4#
  • Tries
    • 1.Sxb4?
      • threat
        • 2.Sd3#
      • 1...Rxa4
        • 2.Sxc6#
      • 1...bxa4
        • 2.Sc4#
      • 1...Se1
        • 2.Qb2#
      • 1...fxe4!
    • 1.Sxe7?
      • threat
        • 2.Sg6#
      • 1...Sh4
        • 2.Qb2#
      • 1...Rf6!
    • 1.gxf8S?
      • threat
        • 2.Sg6#
        • 2.Rxe6#
      • 1...fxe4
        • 2.Sg6#
      • 1...exd5
        • 2.Re6#
      • 1...Sh4
        • 2.Rxe6#
        • 2.Qxf4#
        • 2.Qb2#
      • 1...Sf6
        • 2.Sg6#
        • 2.Bc7#
      • 1...Sc7
        • 2.Sg6#
        • 2.Bxc7#
      • 1...Sg7
        • 2.Sg6#
        • 2.Bc7#
      • 1...cxd5!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Rxe6#
      • 1...Sxf4
        • 2.Qb2#
      • 1...Sxg7
        • 2.Bc7#
      • 1...fxe4
        • 2.Sd3#
      • 1...Rf6
        • 2.Sg6#
      • 1...Sf6
        • 2.Sg6#
        • 2.Bc7#
      • 1...Sc7
        • 2.Bxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(l);N_GUARD::B(K)
    • S(l);N_GUARD::B(K),XS(l)
    • S(l);N_GUARD,XP(J)::B(K)
    • P(e);N_GUARD,XR(D)::S(C)
  • Tries
    • Try
      • S(G);XP(c)
      • Threat
        • S(G)
      • Vars
        • R(h);N_GUARD,XR(D)::S(G),XP(i)
        • P(e);N_GUARD,XR(D)::S(C)
        • S(a);OGATE::QAB(B)
      • Refutation
        • P(g);XP(E)
    • Try
      • S(G);XP(k)
      • Threat
        • S(G)
      • Vars
        • S(a);OGATE::QAB(B)
      • Refutation
        • R(m);
    • Try
      • P(J);XR(m)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);XP(E)::S(J)
        • P(j);XS(G)::R1(H)
      • Refutation
        • P(i);XS(G)
  • Actual
    • S(G);XP(d)
    • Threat
      • R1(H),XP(j)
    • Vars
      • S(a);OGATE,P_SPINS(a),SBLOCK,XS(G)::QAB(B)
      • S(l);N_GUARD,XP(J)::B(K)
      • P(g);SBLOCK,XP(E)::QAB(B)+S(G),DCHECK
      • R(m);SBLOCK::QAB(B)+S(G),DCHECK
      • S(l);N_GUARD::B(K),XS(l)
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