MESON Chess Problem Database

Problem Display
PID: 267748 (8/4pp2/3Bp1p1/3Pnr2/3Rr1b1/3Nkp2/P1BR4/1KQ5 w - - 0 1)

Haring, Jacobus

Probleemblad, 1985

8/4pp2/3Bp1p1/3Pnr2/3Rr1b1/3Nkp2/P1BR4/1KQ5

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qe1#
    • 1...Sxd3
      • 2.R4xd3#
  • Tries
    • 1.Bc5?
      • threat
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Qe1#
      • 1...Rxd4
        • 2.Qe1#
      • 1...f2
        • 2.Rxf2#
      • 1...Sc4
        • 2.Qe1#
      • 1...Sxd3!
    • 1.Rd1+?
      • 1...Ke2
        • 2.Re1#
        • 2.Rxe4#
        • 2.Qd2#
      • 1...Kxd4!
    • 1.Re2+?
      • 1...Kxe2
        • 2.Rxe4#
        • 2.Qe1#
      • 1...Kxd4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rxe4#
      • 1...Kxf4
        • 2.Rg2#
      • 1...Rxd4
        • 2.Re2#
      • 1...Rexf4
        • 2.Qe1#
      • 1...Rfxf4
        • 2.Qe1#
      • 1...exd5
        • 2.Sxd5#
      • 1...f2
        • 2.R2d3#
      • 1...Sd3
        • 2.R4xd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XR(G)::QAR2(B)
    • S(e);OGATE,XS(F)::R1(G),XS(e)
  • Tries
    • Try
      • B(I);
      • Threat
        • DUALS(4)
      • Vars
        • R(c);P_SPINR(c),XR(G)::QAR2(B)
        • P(b);::QAB(B)+R(E),XP(b)
        • S(e);::QAR2(B)
      • Refutation
        • S(e);XS(F)
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(G)
  • Actual
    • S(F);
    • Threat
      • R1(G),XR(c)
    • Vars
      • K(a);N_GUARD,P_SPINR(c),P_SPINS(e),S_FLIGHT,XS(F)::QAB(B)+R(E)
      • R(c);SBLOCK,XR(G)::QAB(B)+R(E),DCHECK
      • R(c);XS(F)::QAR2(B)
      • R(f);SBLOCK,XS(F)::QAR2(B)
      • P(g);XP(H)::S(F),XP(g)
      • P(b);SBLOCK::QAB(B)+R(E),DCHECK
      • S(e);N_GUARD::R1(G),XS(e)
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