MESON Chess Problem Database

Problem Display
PID: 64001 (1Q6/5n2/2pb1N2/1p2P3/RqPkN3/2p2R2/5P1B/n4B1K w - - 0 1)

Ellerman, Arnoldo

Chess, 1946

1Q6/5n2/2pb1N2/1p2P3/RqPkN3/2p2R2/5P1B/n4B1K

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Rd3#
    • 1...Qa5
      • 2.Rd3#
    • 1...Qc5
      • 2.Rd3#
    • 1...Qb2
      • 2.Rd3#
    • 1...Qb3
      • 2.Rd3#
    • 1...Qxc4
      • 2.Rd3#
  • Tries
    • 1.Rxb4?
      • threat
        • 2.Rd3#
        • 2.c5#
      • 1...Sxe5
        • 2.Qxd6#
      • 1...bxc4
        • 2.Rd3#
        • 2.Rxc4#
      • 1...Bc5
        • 2.Rd3#
      • 1...Sc2
        • 2.Rd3#
      • 1...c5
        • 2.Rd3#
      • 1...Bxb4!
    • 1.Qxd6+?
      • 1...Qxd6
        • 2.Rd3#
      • 1...Sxd6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Se6#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Qxc5
        • 2.Rd3#
      • 1...Bxc5
        • 2.Rf4#
      • 1...Sg5
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(c);::R1(E)
    • Q(c);P_SPINQ(c),XP(G)::R1(E)
  • Tries
    • Try
      • R(F);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);N_GUARD,XP(I)::QAR2(K),XB(g)
        • B(g);::R1(E)
        • S(a);::R1(E)
        • P(f);::R1(E)
      • Refutation
        • B(g);XR(F)
    • Try
      • Q(K);CHECK,XB(g)
      • Vars
        • Q(c);XQ(K)::R1(E)
      • Refutation
        • S(h);XQ(K)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(H)::QAB(K)
      • Q(c);SBLOCK,XS(H)::R1(E)
      • B(g);SBLOCK,XS(H)::R(E)
      • S(h);N_GUARD::QAR2(K),XB(g)
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