MESON Chess Problem Database

Problem Display
PID: 54511 (r1b1QB2/pp1pn2K/7p/2k1bR2/B1NRp2q/P1Pn2N1/8/8 w - - 0 1)

Groeneveld, Cornelis

6th Comm., Arguelles MT, 2000

r1b1QB2/pp1pn2K/7p/2k1bR2/B1NRp2q/P1Pn2N1/8/8

#2

10 + 12

102 Probleemblad 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Sxe4#
    • 1...Qf6
      • 2.Sxe4#
    • 1...Qh2
      • 2.Sxe4#
    • 1...Qh3
      • 2.Sxe4#
    • 1...Qh5
      • 2.Sxe4#
    • 1...Sb4
      • 2.axb4#
    • 1...Sf4
      • 2.Sxe4#
    • 1...d5
      • 2.Qb5#
    • 1...d6
      • 2.Qb5#
  • Tries
    • 1.Bxe7+?
      • 1...d6
        • 2.Bxd6#
        • 2.Qb5#
      • 1...Qxe7+!
    • 1.Rxe5+?
      • 1...d5
        • 2.Rexd5#
        • 2.Qb5#
      • 1...Sxe5!
    • 1.Qg6?
      • threat
        • 2.Qd6#
      • 1...Qf6
        • 2.Sxe4#
      • 1...d6
        • 2.Qxd6#
      • 1...d5!
    • 1.Qxd7?
      • threat
        • 2.Qb5#
        • 2.Qd5#
        • 2.Qd6#
        • 2.Qc7#
      • 1...Qf6
        • 2.Sxe4#
        • 2.Qb5#
        • 2.Qd5#
      • 1...Sb4
        • 2.Qb5#
        • 2.Qd6#
        • 2.axb4#
        • 2.cxb4#
      • 1...Sf4
        • 2.Sxe4#
        • 2.Qb5#
        • 2.Qd6#
        • 2.Qc7#
      • 1...a6
        • 2.Qd5#
        • 2.Qd6#
        • 2.Qc7#
      • 1...b5
        • 2.Qxb5#
        • 2.Qd5#
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bxd7!
    • 1.Qf7?
      • threat
        • 2.Qd5#
      • 1...Sb4
        • 2.axb4#
      • 1...Sf4
        • 2.Sxe4#
      • 1...d5
        • 2.Qxd5#
      • 1...d6!
    • 1.Qxe7+?
      • 1...d6
        • 2.Qxd6#
        • 2.Qc7#
      • 1...Qxe7+!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qc7#
      • 1...Qf6
        • 2.Sxe4#
      • 1...Sb4
        • 2.axb4#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD::S(C),XP(b)
    • S(a);OGATE::P(A),XS(a)
    • S(a);S_CUTQ(c)::S(C),XP(b)
    • P(i);N_SPINB(e),OGATE::QAR1(I)
    • P(i);N_SPINS(j),OGATE::QAR1(I)
  • Tries
    • Try
      • B(J);CHECK,XS(j)
      • Refutation
        • Q(c);CHECK,XB(J)
    • Try
      • R(G);CHECK,XB(e)
      • Refutation
        • S(a);XR(G)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • Q(c);N_GUARD::S(C),XP(b)
        • P(i);N_SPINS(j)::QAB1(I),XP(i)
      • Refutation
        • P(i);N_SPINB(e)
    • Try
      • Q(I);XP(i)
      • Threat
        • DUALS(4)
      • Refutation
        • B(l);XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • S(a);OGATE::P(A),XS(a)
        • S(a);S_CUTQ(c)::S(C),XP(b)
        • P(i);N_SPINB(e)::QAR1(I),XP(i)
      • Refutation
        • P(i);N_SPINS(j)
    • Try
      • Q(I);CHECK,XS(j)
      • Refutation
        • Q(c);CHECK,P_SPINQ(c),XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR2(I)
    • Vars
      • Q(c);N_GUARD::S(C),XP(b)
      • S(a);OGATE::P(A),XS(a)
      • P(i);N_SPINB(e),OGATE::QAR1(I),XP(i)
      • P(i);N_SPINS(j),OGATE::QAB1(I),XP(i)
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