MESON Chess Problem Database

Problem Display
PID: 67925 (2bB4/7n/2rn3R/Q2pPk2/2PrN1N1/5pPB/5P1K/4R3 w - - 0 1)

Rice, John Michael

3rd Place, 05. WCCT, 1993-1997

2bB4/7n/2rn3R/Q2pPk2/2PrN1N1/5pPB/5P1K/4R3

#2

12 + 8

145 StrateGems 1998
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Sxd6#
    • 1...Rc5
      • 2.Sxd6#
    • 1...Rc7
      • 2.Sxd6#
    • 1...Sg5
      • 2.Rf6#
    • 1...Sf6
      • 2.Rxf6#
    • 1...Sf8
      • 2.Rf6#
    • 1...dxc4
      • 2.Sgf6#
    • 1...dxe4
      • 2.Se3#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qxf3#
      • 1...Rxe4
        • 2.Se3#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Rd3
        • 2.Sgf6#
      • 1...Sg5
        • 2.Rf6#
      • 1...dxe4!
    • 1.Qxd5?
      • threat
        • 2.Se3#
        • 2.Sgf6#
      • 1...Rxe4
        • 2.Se3#
      • 1...Sxe4
        • 2.Se3#
      • 1...Sg5
        • 2.Se3#
        • 2.Rf6#
      • 1...Sf6
        • 2.Se3#
        • 2.Sgxf6#
        • 2.Rxf6#
      • 1...Rxd5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxh7#
      • 1...Rxc7
        • 2.Sxd6#
      • 1...Sxc4
        • 2.Sgf6#
      • 1...Sxe4
        • 2.Se3#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Sb5
        • 2.Sgf6#
      • 1...Sb7
        • 2.Sgf6#
      • 1...Sf7
        • 2.Sgf6#
      • 1...Se8
        • 2.Sgf6#
      • 1...Sg5
        • 2.Rf6#
      • 1...Sf8
        • 2.Rf6#

Anticipated by 102847(1952)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD,XP(F)::S(G),XS(f)
    • R(e);N_GUARD::S(G),XS(f)
    • S(g);N_GUARD::R1(K)
    • S(g);N_GUARD::R1(K),XS(g)
    • P(c);XP(F)::B(E)+S(H)
    • P(c);SBLOCK,XS(G)::B(E)+S(H),DCHECK
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR2(I),XP(a)
      • Vars
        • R(b);SBLOCK,XS(G)::B(E)+S(H),DCHECK
        • S(g);N_GUARD::R1(K),XS(g)
        • R(b);::B(E)+S(H)
        • S(g);N_GUARD::R1(K)
      • Refutation
        • P(c);XS(G)
    • Try
      • Q(I);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XS(G)::B(E)+S(H),DCHECK
        • S(f);XS(G)::B(E)+S(H),DCHECK
      • Refutation
        • R(b);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB(I),XS(g)
    • Vars
      • R(e);N_GUARD,XQ(I)::S(G),XS(f)
      • S(f);XP(F)::B(E)+S(H)
      • S(f);SBLOCK,XS(G)::B(E)+S(H),DCHECK
      • S(g);N_GUARD::R1(K),XS(g)
      • B(h);N_GUARD::QAB(I),XB(h)
      • S(f);::B(E)+S(H)
      • S(g);N_GUARD::R1(K)
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