MESON Chess Problem Database

Problem Display
PID: 147026 (2R1r3/qPpkb1R1/1p1N2K1/3P1PN1/1B6/8/8/8 w - - 0 1)

Bicknell, Stephen

Australian Chess Problem Magazine, 1995

2R1r3/qPpkb1R1/1p1N2K1/3P1PN1/1B6/8/8/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.b8S#
    • 1...Qa2
      • 2.b8S#
    • 1...Qa3
      • 2.b8S#
    • 1...Qa4
      • 2.b8S#
    • 1...Qa5
      • 2.b8S#
    • 1...Qa6
      • 2.b8S#
    • 1...Rxc8
      • 2.bxc8Q#
    • 1...c5
      • 2.dxc5 ep#
    • 1...c6
      • 2.dxc6#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Se5#
      • 1...Rxc8
        • 2.bxc8Q#
      • 1...c5
        • 2.dxc5 ep#
      • 1...Qa1
        • 2.b8S#
      • 1...cxd6!
    • 1.Sge4?
      • threat
        • 2.Sf6#
      • 1...Rxc8
        • 2.bxc8Q#
      • 1...Qa1
        • 2.b8S#
      • 1...c5
        • 2.dxc5 ep#
      • 1...Rf8!
    • 1.Sgf7?
      • threat
        • 2.Se5#
      • 1...Rxc8
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Qa1
        • 2.b8S#
      • 1...c5
        • 2.dxc5 ep#
      • 1...cxd6!
    • 1.Sxe8?
      • threat
        • 2.Sf6#
        • 2.Rxe7#
      • 1...Qa1
        • 2.Rxe7#
      • 1...c5
        • 2.dxc5 ep#
      • 1...Qxb7!
    • 1.Rxc7+?
      • 1...Kd8
        • 2.Se6#
      • 1...Kxc7!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Sf6#
      • 1...Rxc8
        • 2.bxc8Q#
      • 1...c5
        • 2.dxc5 ep#
      • 1...Qa1
        • 2.b8S#
      • 1...Rf8
        • 2.Sxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::P=S
    • R(f);OGATE,XR(I)::PXR(f)=Q
    • P(c);OGATE::P(B),XP(c),EP
    • P(c);OGATE::P(B),XP(c)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • R(f);OGATE,XR(I)::PXR(f)=Q
        • P(c);OGATE::P(B),XP(c),EP
        • Q(b);N_GUARD::P=S
      • Refutation
        • P(c);XS(E)
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • R(f);OGATE,XR(I)::PXR(f)=Q
        • Q(b);N_GUARD::P=S
        • P(c);OGATE::P(B),XP(c),EP
      • Refutation
        • R(f);
    • Try
      • S(D);N_PINB(e)
      • Threat
        • S(D)
      • Vars
        • R(f);OGATE,XR(I)::PXR(f)=Q
        • Q(b);N_GUARD::P=S
        • P(c);OGATE::P(B),XP(c),EP
      • Refutation
        • P(c);XS(E)
    • Try
      • S(E);XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::R1(H),XB(e)
        • P(c);OGATE::P(B),XP(c),EP
      • Refutation
        • Q(b);XP(G)
    • Try
      • R(I);CHECK,XP(c)
      • Vars
        • K(d);N_SPINB(e),P-FLIGHT::S(D)
      • Refutation
        • K(d);P-FLIGHT,XR(I)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(f);OGATE,XR(I)::PXR(f)=Q
      • P(c);OGATE::P(B),XP(c),EP
      • Q(b);N_GUARD::P=S
      • R(f);N_GUARD::S(D),XR(f)
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