MESON Chess Problem Database

Problem Display
PID: 81113 (8/4p3/4N1Q1/2pbRN2/R1Ppn2K/3kp2p/1P1prr2/3B2B1 w - - 0 1)

Shire, David J

The Problemist, 2008

8/4p3/4N1Q1/2pbRN2/R1Ppn2K/3kp2p/1P1prr2/3B2B1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Sf4#
    • 1...Rh2
      • 2.Sf4#
    • 1...Rf4+
      • 2.Sxf4#
    • 1...Sc3
      • 2.Sxc5#
    • 1...Sg3
      • 2.Sxc5#
    • 1...Sg5
      • 2.Sxc5#
    • 1...Sd6
      • 2.Sxc5#
    • 1...Sf6
      • 2.Sxc5#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Sxc5#
      • 1...Rf4+
        • 2.Sxf4#
      • 1...Bxe6
        • 2.Qxe4#
      • 1...Rf5!
    • 1.Sfxd4?
      • threat
        • 2.Bc2#
      • 1...Bxe6
        • 2.Qxe4#
      • 1...cxd4
        • 2.Sc5#
      • 1...Rf4+!
    • 1.Sh6?
      • threat
        • 2.Sxc5#
      • 1...Rf4+
        • 2.Sxf4#
      • 1...Bxe6
        • 2.Qxe4#
      • 1...Rf5!
    • 1.Sxe7?
      • threat
        • 2.Sxc5#
      • 1...Rf4+
        • 2.Sxf4#
      • 1...Bxe6
        • 2.Qxe4#
      • 1...Rf5!
    • 1.Sfg7?
      • threat
        • 2.Sxc5#
      • 1...Rf4+
        • 2.Sxf4#
      • 1...Bxe6
        • 2.Qxe4#
      • 1...Rf5!
  • Keys
    • 1.Sxe3!
      • threat
        • 2.Ra3#
      • 1...Rf4+
        • 2.Sxf4#
      • 1...Kxe3
        • 2.Qg3#
      • 1...Rxe3
        • 2.Sxc5#
      • 1...Bxc4
        • 2.Qxe4#
      • 1...dxe3
        • 2.Rxd5#
      • 1...Rf5
        • 2.Bc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::S(I)
    • R(c);CHECK,N_GUARD::S(I),XR(c)
    • S(h);N_GUARD::S(I),XP(i)
  • Tries
    • Try
      • S(H);P_PINS(h)
      • Threat
        • S(I),XP(i)
      • Vars
        • R(c);CHECK,N_GUARD::S(I),XR(c)
        • B(j);N_GUARD,XS(I)::QAB1(J),XS(h)
      • Refutation
        • R(c);N_SPINS(h)
    • Try
      • S(H);P_PINS(h),XP(g)
      • Threat
        • B(A)
      • Vars
        • B(j);N_GUARD,XS(I)::QAB1(J),XS(h)
        • P(i);SBLOCK,XS(H)::S(I)
      • Refutation
        • R(c);CHECK
    • Try
      • S(H);P_PINS(h)
      • Threat
        • S(I),XP(i)
      • Vars
        • R(c);CHECK,N_GUARD::S(I),XR(c)
        • B(j);N_GUARD,XS(I)::QAB1(J),XS(h)
      • Refutation
        • R(c);N_SPINS(h)
    • Try
      • S(H);P_PINS(h),XP(k)
      • Threat
        • S(I),XP(i)
      • Vars
        • R(c);CHECK,N_GUARD::S(I),XR(c)
        • B(j);N_GUARD,XS(I)::QAB1(J),XS(h)
      • Refutation
        • R(c);N_SPINS(h)
    • Try
      • S(H);P_PINS(h)
      • Threat
        • S(I),XP(i)
      • Vars
        • R(c);CHECK,N_GUARD::S(I),XR(c)
        • B(j);N_GUARD,XS(I)::QAB1(J),XS(h)
      • Refutation
        • R(c);N_SPINS(h)
  • Actual
    • S(H);P_PINS(h),XP(e)
    • Threat
      • R(D)
    • Vars
      • R(c);CHECK,N_GUARD::S(I),XR(c)
      • K(d);OGATEB,P-FLIGHT,P_SPINR(c),XS(H)::QAR2(J)
      • R(b);SBLOCK,XS(H)::S(I),XP(i)
      • B(j);N_GUARD,XP(E)::QAB1(J),XS(h)
      • P(g);OGATEB,SBLOCK,XS(H)::R(G),XB(j)
      • R(c);N_SPINS(h)::B(A)
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