MESON Chess Problem Database

Problem Display
PID: 120607 (b7/2B1N2B/q1r1p3/1r2p2R/np1kNp2/1p6/3PQ3/3R2K1 w - - 0 1)

Hjelle, David

Northwest Chess, 1976

b7/2B1N2B/q1r1p3/1r2p2R/np1kNp2/1p6/3PQ3/3R2K1

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rbb6
      • 2.Bxe5#
    • 1...Rb7
      • 2.Bxe5#
    • 1...Rb8
      • 2.Bxe5#
    • 1...Rc3
      • 2.dxc3#
    • 1...Sc3
      • 2.dxc3#
    • 1...Sc5
      • 2.Bxe5#
  • Tries
    • 1.Sf5+?
      • 1...Kd5
        • 2.Qd3#
      • 1...exf5!
    • 1.Qf2+?
      • 1...Kc4
        • 2.d3#
      • 1...Kd3!
    • 1.Qe3+?
      • 1...Kc4
        • 2.d3#
      • 1...fxe3!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sxb3#
      • 1...Kxc5
        • 2.d4#
      • 1...Rbxc5
        • 2.Qe4#
      • 1...Rcxc5
        • 2.Qd3#
      • 1...Sxc5
        • 2.Bxe5#
      • 1...b2
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::B(G),XP(g)
    • R(i);OGATE::R(A)+P(C)DCHECK,XR(i)
    • S(b);OGATE::R(A)+P(C)DCHECK,XS(b)
    • S(b);S_CUTR(f)::B(G),XP(g)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(D)
      • Refutation
        • P(j);XS(H)
    • Try
      • Q(D);CHECK
      • Vars
        • K(d);P-FLIGHT::P(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(d);P-FLIGHT::P(C)
      • Refutation
        • P(e);XQ(D)
  • Actual
    • S(E);
    • Threat
      • S(E),XP(a)
    • Vars
      • K(d);OGATE,P_SPINP(g),S_FLIGHT,XS(E)::P(C)
      • R(f);SBLOCK,XS(E)::QAR1(D)
      • R(i);SBLOCK,XS(E)::QAR1(D)
      • S(b);SBLOCK,XS(E)::B(G),XP(g)
      • P(a);::S(E)
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