MESON Chess Problem Database

Problem Display
PID: 88299 (B2K4/B7/1N3N1R/1n5p/1P1kP3/6Q1/2P2R2/b2r4 w - - 0 1)

Caillaud, Michel

The Problemist, 1990

B2K4/B7/1N3N1R/1n5p/1P1kP3/6Q1/2P2R2/b2r4

#2

11 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Rd2#
    • 1...Rc1
      • 2.Rd2#
    • 1...Re1
      • 2.Rd2#
    • 1...Rf1
      • 2.Rd2#
    • 1...Rg1
      • 2.Rd2#
    • 1...Rh1
      • 2.Rd2#
    • 1...Rd2
      • 2.Rxd2#
  • Tries
    • 1.Sbd5+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Sxa7!
    • 1.Sbd7+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Sxa7!
    • 1.Sg4?
      • threat
        • 2.Qe5#
        • 2.Qe3#
      • 1...Rd3
        • 2.Qe5#
        • 2.Qxd3#
      • 1...Re1
        • 2.Rd2#
        • 2.Qe5#
        • 2.Qd3#
      • 1...hxg4!
    • 1.Rf5?
      • threat
        • 2.Rd5#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Sc3
        • 2.Qf2#
      • 1...Sc7!
    • 1.Qe5+?
      • 1...Ke3+
        • 2.Sbd5#
      • 1...Kxe5+!
    • 1.Qc7?
      • threat
        • 2.Qc5#
      • 1...Ke3+
        • 2.Sbd5#
      • 1...Sxc7!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Sfd7#
      • 1...Rxd3!
    • 1.Qe3+?
      • 1...Kxe3+
        • 2.Sbd5#
      • 1...Ke5+!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Sg4#
      • 1...Kc3+
        • 2.Sfd5#
      • 1...Ke3+
        • 2.Sbd5#
      • 1...Ke5+
        • 2.Sfd7#

This is after 21329

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::R(B)
    • R(b);N_GUARD::R(B),XR(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT,P_PINS(F)::QAB1(C)
      • Refutation
        • S(d);XB(I)
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT,P_PINS(F)::QAB1(C)
      • Refutation
        • S(d);XB(I)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);XS(G)
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • R(b);N_GUARD::QAR1(C),XR(b)
        • S(d);SBLOCK::QAB(C)
      • Refutation
        • S(d);
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);CHECK,S_FLIGHT::B(I)+S(F),DCHECK
      • Refutation
        • K(c);CHECK,S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(c);CHECK,S_FLIGHT::B(I)+S(F),DCHECK
      • Refutation
        • S(d);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P_PINQ(C),S_FLIGHT::S(G)
      • Refutation
        • R(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);CHECK,S_FLIGHT,XQ(C)::B(I)+S(F),DCHECK
      • Refutation
        • K(c);CHECK,S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+S(G)
    • Vars
      • K(c);CHECK,S_FLIGHT::QAB(C)+S(G),DCHECK
      • K(c);CHECK,S_FLIGHT::B(I)+S(F),DCHECK
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