MESON Chess Problem Database

Problem Display
PID: 208165 (3r2q1/8/P1p3p1/K1p2N2/2k5/2pN1PQ1/8/B2R1B2 w - - 0 1)

Dixon, Joseph

Australasian (The), 1875

3r2q1/8/P1p3p1/K1p2N2/2k5/2pN1PQ1/8/B2R1B2

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Sc1#
    • 1...Rb8
      • 2.Sc1#
    • 1...Rc8
      • 2.Sc1#
    • 1...Rf8
      • 2.Sc1#
  • Tries
    • 1.Se3+?
      • 1...Kd4
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kb3!
    • 1.Qf4+?
      • 1...Kb3
        • 2.Qa4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Rd4!
    • 1.Qh4+?
      • 1...Kb3
        • 2.Qa4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Rd4!
    • 1.Qg4+?
      • 1...Kb3
        • 2.Qa4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Rd4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Sb2#
        • 2.Se5#
      • 1...Kd5
        • 2.Sf4#
      • 1...Rxd3
        • 2.Qxg8#
      • 1...Rxb8
        • 2.Sc1#
      • 1...Rd4
        • 2.Se3#
      • 1...c2
        • 2.Se5#
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD,P_PINP(I)::B(C)+S(D)
    • R(f);N_GUARD::B(C)+S(D)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(F)
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(F)
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(F)
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT::R(B)+S(D),DCHECK
      • R(f);OGATE,P_SPINR(f),XS(D)::QAB(F),XQ(g)
      • R(f);N_GUARD,XQ(F)::B(C)+S(D)
      • R(f);SBLOCK::S(H)
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