MESON Chess Problem Database

Problem Display
PID: 139351 (8/5p2/NRPkPP2/p1rN3K/1n2PP2/B2R4/Q7/1b6 w - - 0 1)

Ellerman, Arnoldo

L'Echiquier, 1926

8/5p2/NRPkPP2/p1rN3K/1n2PP2/B2R4/Q7/1b6

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Sc3#
      • 2.Se3#
      • 2.Sdxb4#
      • 2.Sdc7#
      • 2.Se7#
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...Sxa2
      • 2.c7#
    • 1...Sc2
      • 2.c7#
    • 1...Sxd3
      • 2.c7#
    • 1...Sxd5
      • 2.Qxd5#
      • 2.c7#
    • 1...Sxa6
      • 2.c7#
    • 1...fxe6
      • 2.e5#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Kxe6
        • 2.Qe5#
      • 1...Sxd3
        • 2.c7#
      • 1...Rc3!
    • 1.Qb2?
      • threat
        • 2.Qe5#
      • 1...Kxe6
        • 2.Qe5#
      • 1...Sxd3
        • 2.c7#
      • 1...Rc3!
  • Keys
    • 1.Qh2!
      • threat
        • 2.f5#
      • 1...Kxe6
        • 2.f5#
      • 1...Sxd3
        • 2.c7#
      • 1...fxe6
        • 2.e5#
      • 1...Rc2
        • 2.Sdc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(d);CHECK,OGATE,P_SPINR(d),P_SPINS(b),XS(F)::QAR1(A),XR(d)
    • S(b);N_GUARD,P_SPINR(d),XQ(A)::R(I)+P(J)
    • S(b);N_GUARD,P_SPINR(d)::R(I)+P(J)
    • S(b);N_GUARD,P_SPINR(d),XR(C)::R(I)+P(J)
    • S(b);N_GUARD,P_SPINR(d),XS(H)::R(I)+P(J)
    • P(f);SBLOCK,XP(K)::P(D)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(e);P-FLIGHT,XP(K)::QAR1(A)
        • S(b);N_GUARD,P_SPINR(d),XR(C)::R(I)+P(J)
      • Refutation
        • R(d);N_PINS(F),P_SPINS(b)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(e);P-FLIGHT,XP(K)::QAR1(A)
        • S(b);N_GUARD,P_SPINR(d),XR(C)::R(I)+P(J)
      • Refutation
        • R(d);N_PINS(F),P_SPINS(b)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(E)
    • Vars
      • K(e);P-FLIGHT,XP(K)::P(E)
      • S(b);N_GUARD,P_SPINR(d),XR(C)::R(I)+P(J)
      • P(f);SBLOCK,XP(K)::P(D)
      • R(d);N_PINS(F),P_SPINS(b)::R(C)+S(F)
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