MESON Chess Problem Database

Problem Display
PID: 108259 (6bq/3R1P2/1b2N1Q1/2N4p/KPkP4/5nRr/1P1r4/7B w - - 0 1)

du Gres, Jacques

Northwest Chess, 1979

6bq/3R1P2/1b2N1Q1/2N4p/KPkP4/5nRr/1P1r4/7B

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qc2#
    • 1...Rxb2
      • 2.Qd3#
    • 1...Rc2
      • 2.Qxc2#
      • 2.Qd3#
    • 1...Re2
      • 2.Qd3#
    • 1...Rf2
      • 2.Qd3#
    • 1...Rg2
      • 2.Qd3#
    • 1...Rdh2
      • 2.Qd3#
    • 1...Rd3
      • 2.Qxd3#
    • 1...Rxd4
      • 2.Qc2#
    • 1...Se1
      • 2.Bd5#
      • 2.b3#
    • 1...Sg1
      • 2.Bd5#
      • 2.b3#
    • 1...Sh2
      • 2.Bd5#
      • 2.b3#
    • 1...Sxd4
      • 2.Bd5#
    • 1...Sh4
      • 2.Bd5#
      • 2.b3#
    • 1...Se5
      • 2.Bd5#
      • 2.b3#
    • 1...Sg5
      • 2.Bd5#
      • 2.b3#
  • Tries
    • 1.Rxf3?
      • threat
        • 2.b3#
      • 1...Rxb2
        • 2.Qd3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxf3!
    • 1.Qb1?
      • threat
        • 2.Qa2#
      • 1...Rxb2
        • 2.Qd3#
      • 1...Sxd4
        • 2.Bd5#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Bxc5!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Qe6#
      • 1...Rxb2
        • 2.Qd3#
      • 1...Rxd4
        • 2.Qc2#
      • 1...Bxc5
        • 2.Qa6#
      • 1...Bxf7
        • 2.Qxf7#
      • 1...Sxd4
        • 2.Bd5#
      • 1...Qh6
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Re2
        • 2.Qd3#
      • 1...Sg5
        • 2.b3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::QAR2(I)
    • R(a);N_GUARD,XP(B)::QAB1(I)
    • R(a);N_GUARD::QAB1(I)
    • R(a);N_GUARD::QAB1(I),XR(a)
    • R(a);N_GUARD,XP(F)::QAR2(I)
    • S(b);OGATE,XP(F)::B(A)
  • Tries
    • Try
      • R(C);XS(b)
      • Threat
        • P(B)
      • Vars
        • R(a);N_GUARD,XP(B)::QAB1(I)
        • R(a);N_GUARD::QAB1(I),XR(a)
      • Refutation
        • R(c);XR(C)
    • Try
      • Q(I);
      • Threat
        • QAB(I)
      • Vars
        • R(a);N_GUARD,XP(B)::QAB1(I)
        • S(b);OGATE,XP(F)::B(A)
        • R(a);N_GUARD::QAB1(I),XR(a)
      • Refutation
        • B(f);XS(G)
  • Actual
    • S(H);
    • Threat
      • QAB(I)
    • Vars
      • R(a);N_GUARD,XP(B)::QAB1(I)
      • R(a);N_GUARD,XP(F)::QAR2(I)
      • B(f);OGATE,XS(G)::QAB(I)
      • B(g);OGATE,XP(K)::QAB(I),XB(g)
      • S(b);OGATE,SBLOCK,XP(F)::B(A)
      • Q(h);N_GUARD::PXB(g)=Q
      • R(a);N_GUARD::QAB1(I)
      • S(b);::P(B)
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