MESON Chess Problem Database

Problem Display
PID: 249140 (8/p1P2Kp1/1r1p4/1B1N1Rp1/N2kp3/1Pp3R1/nP1r1P2/6B1 w - - 0 1)

van Dooren, Rene

The Problemist, 1990

8/p1P2Kp1/1r1p4/1B1N1Rp1/N2kp3/1Pp3R1/nP1r1P2/6B1

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.bxc3#
    • 1...Sb4
      • 2.bxc3#
    • 1...e3
      • 2.Rg4#
  • Tries
    • 1.Sdxc3?
      • threat
        • 2.Rd5#
      • 1...Rxf2
        • 2.Se2#
      • 1...Rxb5
        • 2.Sxb5#
      • 1...Sxc3
        • 2.bxc3#
      • 1...d5
        • 2.Rxd5#
      • 1...Sb4!
    • 1.Se3?
      • threat
        • 2.Rd5#
      • 1...Rxf2
        • 2.Sc2#
      • 1...Sb4
        • 2.bxc3#
      • 1...d5
        • 2.Rxd5#
      • 1...Rxb5!
    • 1.Se7?
      • threat
        • 2.Rd5#
      • 1...Rxb5
        • 2.Sc6#
      • 1...e3
        • 2.Rg4#
      • 1...Sb4
        • 2.bxc3#
      • 1...d5
        • 2.Rxd5#
      • 1...Rxf2!
    • 1.f3+?
      • 1...e3
        • 2.Bxe3#
        • 2.Rg4#
      • 1...Rf2!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Rd5#
      • 1...Rxf2
        • 2.Sc2#
      • 1...Rxb5
        • 2.Sc6#
      • 1...Sxb4
        • 2.bxc3#
      • 1...e3
        • 2.Rg4#
      • 1...d5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::P(B),XP(c)
    • P(e);OGATEB::R(E)
  • Tries
    • Try
      • S(H);XP(c)
      • Threat
        • R1(I)
      • Vars
        • R(b);N_GUARD,P_PINR(I),P_SPINR(b),XP(C)::S(H)
        • R(g);XB(G)::S(H),XR(g)
        • S(a);OGATE,XS(H)::P(B),XS(a)
        • P(h);::R1(I),XP(h)
      • Refutation
        • S(a);
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • R(b);N_GUARD,P_PINR(I),XP(C)::S(H)
        • S(a);N_GUARD::P(B),XP(c)
        • P(h);::R1(I),XP(h)
      • Refutation
        • R(g);XB(G)
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • R(g);N_GUARD,XB(G)::S(H)
        • P(e);OGATEB::R(E)
        • S(a);N_GUARD::P(B),XP(c)
        • P(h);::R1(I),XP(h)
      • Refutation
        • R(b);P_PINR(I),P_SPINR(b),XP(C)
    • Try
      • P(C);CHECK
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • S(H);
    • Threat
      • R1(I)
    • Vars
      • R(b);N_GUARD,P_PINR(I),P_SPINR(b),XP(C)::S(H)
      • R(g);N_GUARD,XB(G)::S(H)
      • S(a);N_GUARD,XS(H)::P(B),XP(c)
      • P(e);OGATEB::R(E)
      • P(h);::R1(I),XP(h)
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