MESON Chess Problem Database

Problem Display
PID: 160426 (1RK2nB1/2p2N2/2pp1B2/N1kP2P1/5p1r/pp1R3p/2n3pQ/1b6 w - - 0 1)

Shire, David J

British Chess Magazine, 2008

1RK2nB1/2p2N2/2pp1B2/N1kP2P1/5p1r/pp1R3p/2n3pQ/1b6

#2

10 + 13

15 British Chess Magazine 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qg1#
    • 1...Se1
      • 2.Qg1#
    • 1...Sb4
      • 2.Qg1#
    • 1...cxd5
      • 2.Rc3#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sxb3#
      • 1...dxe5
        • 2.Be7#
      • 1...Sa1
        • 2.Qg1#
      • 1...Sd4
        • 2.Rc3#
      • 1...b2
        • 2.Sb3#
      • 1...Ba2!
    • 1.Sd8?
      • threat
        • 2.Rc3#
      • 1...Se3
        • 2.Bd4#
      • 1...Se6
        • 2.Sxe6#
      • 1...f3!
    • 1.Qg1+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se3!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Se4#
      • 1...Kxd6
        • 2.Sb7#
      • 1...cxd5
        • 2.Rxd5#
      • 1...cxd6
        • 2.Rc3#
      • 1...f3
        • 2.Sxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::QAB(A)
    • P(j);SBLOCK,XP(D)::R(B)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(C),XP(e)
      • Vars
        • P(k);OGATEB,XS(G)::B(F)
        • S(b);N_GUARD::QAB(A)
        • S(b);SBLOCK::R(B)
        • P(e);::S(C)
      • Refutation
        • B(a);
    • Try
      • S(G);
      • Threat
        • R(B)
      • Vars
        • S(b);N_GUARD::B(F)
        • S(m);N_GUARD::S(G),XS(m)
      • Refutation
        • P(g);
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(G);XP(k)
    • Threat
      • S(G)
    • Vars
      • K(i);P_SPINP(g),S_FLIGHT,XS(G)::S(C)
      • P(j);OGATE,XP(D)::R1(B),XP(j)
      • P(l);SBLOCK,XS(G)::R(B)
      • P(g);::S(C),XP(e)
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