MESON Chess Problem Database

Problem Display
PID: 18965 (4b3/5n2/1Q3pRB/6PK/2P2k2/R1b2NN1/2PprpPP/q2r4 w - - 0 1)

Quack, Godfrey C

The Tablet, 1959

(First published on Sat Oct 3 1959)

4b3/5n2/1Q3pRB/6PK/2P2k2/R1b2NN1/2PprpPP/q2r4

#2

12 + 10

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.gxf6#
    • 1...Sd6
      • 2.gxf6#
    • 1...Sd8
      • 2.gxf6#
    • 1...Sh8
      • 2.gxf6#
  • Tries
    • 1.Qd4+?
      • 1...Re4
        • 2.Rxf6#
        • 2.Qxe4#
      • 1...Bxd4!
    • 1.Qd6+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Be5
        • 2.Rxf6#
      • 1...Se5
        • 2.gxf6#
      • 1...Sxd6
        • 2.gxf6#
      • 1...Re5!
    • 1.Qxf6+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Bxf6!
    • 1.gxf6+?
      • 1...Sg5
        • 2.Bxg5#
      • 1...Sxh6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sd3#
      • 1...Kxe5
        • 2.Qxf6#
      • 1...Rxe5
        • 2.Qxf2#
      • 1...Bxe5
        • 2.Rf3#
      • 1...Sxe5
        • 2.gxf6#
      • 1...fxe5
        • 2.Rf6#
      • 1...Re3
        • 2.Qxf6#
      • 1...Bd4
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • S(i);N_GUARD,P_PINR(K)::B(L)+P(H),XP(h)
  • Tries
    • Try
      • Q(J);CHECK
      • Refutation
        • B(f);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • K(g);P_SPINB(f),S_FLIGHT::QAB1(J)
        • B(f);P_SPINB(f)::R(K),XP(h)
        • S(i);P_PINR(K),P_SPINS(i)::B(L)+P(H),XP(h)
        • S(i);P_PINR(K),XQ(J)::B(L)+P(H),XP(h)
      • Refutation
        • R(d);P_PINP(H),P_SPINR(d)
    • Try
      • Q(J);CHECK,XP(h)
      • Vars
        • K(g);P_SPINB(f),S_FLIGHT::QAB1(J)
      • Refutation
        • B(f);XQ(J)
    • Try
      • P(H);CHECK,XP(h)
      • Vars
        • S(i);N_GUARD,P_PINR(K),P_SPINS(i)::B(L),XS(i)
      • Refutation
        • S(i);P_PINR(K),XB(L)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(g);S_FLIGHT,XS(E)::QAB1(J),XP(h)
      • R(d);N_GUARD,P_PINP(H),SBLOCK,XS(E)::QAR2(J),XP(e)
      • B(f);OGATE,SBLOCK,XS(E)::R1(D)
      • S(i);N_GUARD,P_PINR(K),SBLOCK,XS(E)::B(L)+P(H),XP(h)
      • P(h);SBLOCK,XS(E)::R(K)
      • R(d);SBLOCK::QAR2(J),XP(h)
      • B(f);::QAR2(J),XP(h)
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