MESON Chess Problem Database

Problem Display
PID: 72936 (bb1n1N2/q2P2RK/p3rk2/3pp2R/1N6/8/1Q6/8 w - - 0 1)

Groeneveld, Cornelis

Neue Osnabrucker Zeitung, 1993

bb1n1N2/q2P2RK/p3rk2/3pp2R/1N6/8/1Q6/8

#2

7 + 9

6113 Problemschach-Jahrbuch (1993) 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Qxf2#
    • 1...Qb7
      • 2.Qf2#
    • 1...Qc7
      • 2.Qf2#
    • 1...Qxd7
      • 2.Sxd7#
      • 2.Qf2#
    • 1...Rb6
      • 2.Qf2#
    • 1...Rc6
      • 2.Sxd5#
    • 1...Rd6
      • 2.Qxe5#
    • 1...Re8
      • 2.dxe8S#
    • 1...Sc6
      • 2.Sxd5#
    • 1...Sb7
      • 2.Sxd5#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qf3#
        • 2.Qg5#
        • 2.Qg6#
      • 1...Qg1
        • 2.Qf3#
      • 1...Qf2
        • 2.Qxf2#
        • 2.Qg5#
        • 2.Qg6#
      • 1...Qe3
        • 2.Qg6#
      • 1...Qd4
        • 2.Qg5#
        • 2.Qg6#
      • 1...d4
        • 2.Qg5#
        • 2.Qg6#
      • 1...e4
        • 2.Qg5#
        • 2.Qg6#
      • 1...Sf7!
  • Keys
    • 1.Kg8!
      • threat
        • 2.Sh7#
      • 1...Sf7
        • 2.Rxf7#
      • 1...Rb6
        • 2.Qf2#
      • 1...Rc6
        • 2.Sxd5#
      • 1...Rd6
        • 2.Qxe5#
      • 1...Re7
        • 2.Rg6#
      • 1...Re8
        • 2.dxe8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD::QAR(A),XQ(f)
    • Q(f);N_GUARD::QAR(A)
    • R(d);S_CUTQ(f)::QAR(A)
    • R(d);S_CUTB(g)::S(B),XP(a)
    • R(d);N_GUARD,S_CUTB(h)::QAB1(A),XP(b)
    • R(d);OGATE::PXR(d)=S
    • S(i);S_CUTB(g)::S(B),XP(a)
  • Tries
    • Try
      • Q(A);N_PINP(b)
      • Threat
        • DUALS(3)
      • Vars
        • Q(f);::QAR(A)
        • Q(f);::QAR1(A)
      • Refutation
        • S(i);
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • S(G)
    • Vars
      • S(i);N_GUARD::R1(E),XS(i)
      • R(d);S_CUTQ(f)::QAR(A)
      • R(d);S_CUTB(g)::S(B),XP(a)
      • R(d);N_GUARD,S_CUTB(h)::QAB1(A),XP(b)
      • R(d);SBLOCK::R1(E)
      • R(d);OGATE,P_PINS(G)::PXR(d)=S
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