MESON Chess Problem Database

Problem Display
PID: 271076 (K3R3/8/5B1p/2p2p2/p3n3/Rn2k1pN/1p4P1/1qbQN3 w - - 0 1)

Ellerman, Arnoldo

Probleemblad, 1951

K3R3/8/5B1p/2p2p2/p3n3/Rn2k1pN/1p4P1/1qbQN3

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sc2#
      • 2.Qd3#
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qa1
      • 2.Sc2#
      • 2.Qd3#
    • 1...Bd2
      • 2.Qf3#
    • 1...c4
      • 2.Bd4#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Qf3#
      • 1...Sd4
        • 2.Bd2#
        • 2.Bxd4#
      • 1...Sd2!
    • 1.Be5?
      • threat
        • 2.Bf4#
      • 1...f4
        • 2.Bxf4#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Bd2
        • 2.Qf3#
      • 1...Sd2!
    • 1.Bg5+?
      • 1...f4
        • 2.Bxf4#
      • 1...hxg5!
    • 1.Rxb3+?
      • 1...Qd3
        • 2.Sc2#
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...axb3!
  • Keys
    • 1.Be7!
      • threat
        • 2.Bxc5#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Sd6
        • 2.Bg5#
      • 1...Qc2
        • 2.Sxc2#
      • 1...c4
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD::S(B),XQ(a)
    • Q(a);N_GUARD,N_SPINS(d),P_SPINS(h)::QAR1(A),XQ(a)
    • B(b);SBLOCK::QAR1(A)
    • P(i);N_GUARD::B(F)
  • Tries
    • Try
      • B(F);N_PINS(d),P_PINS(h)
      • Threat
        • QAR1(A)
      • Refutation
        • S(d);
    • Try
      • B(F);
      • Threat
        • B(F)
      • Vars
        • P(j);::B(F),XP(j)
        • Q(a);N_GUARD,N_SPINS(d)::QAR1(A),XQ(a)
        • B(b);SBLOCK::QAR1(A)
      • Refutation
        • S(h);
    • Try
      • B(F);CHECK
      • Vars
        • P(j);P_SPINP(j)::B(F),XP(j)
      • Refutation
        • P(k);XB(F)
    • Try
      • R(D);CHECK,P_PINS(h),XS(d)
      • Refutation
        • P(g);XR(D)
  • Actual
    • B(F);
    • Threat
      • B(F),XP(i)
    • Vars
      • Q(a);N_GUARD,N_SPINS(d)::QAR1(A),XQ(a)
      • S(h);::R(H)+B(F),DCHECK
      • Q(a);N_GUARD::S(B),XQ(a)
      • P(i);::B(F)
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Developed and maintained by Brian Stephenson.
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