MESON Chess Problem Database

Problem Display
PID: 144797 (1rn5/2p1n1r1/8/2PPk2N/6pb/7b/2B1K1N1/3QRR2 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1931

1rn5/2p1n1r1/8/2PPk2N/6pb/7b/2B1K1N1/3QRR2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Kxf2#
    • 1...Bf6
      • 2.Kf2#
    • 1...Sf5
      • 2.Rxf5#
    • 1...Sc6
      • 2.Rf5#
    • 1...Sg6
      • 2.Rf5#
    • 1...Sg8
      • 2.Rf5#
    • 1...g3
      • 2.Kf3#
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sd7#
      • 1...Bxf6
        • 2.Kf2#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sc6
        • 2.Rf5#
      • 1...Sg6
        • 2.Rf5#
      • 1...Sg8
        • 2.Rf5#
      • 1...Sb6
        • 2.Qa1#
      • 1...g3
        • 2.Kd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);::R(B)+K(E),XB(c)
    • B(c);::R(B)+K(E)
    • S(f);N_GUARD::R1(C),XS(f)
    • S(f);N_GUARD::R1(C)
    • P(b);::R(B)+K(E)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • B(c);SBLOCK,XS(I)::R(B)+K(E)
      • S(f);OGATE,XP(H)::QAR1(A),XS(f)
      • S(f);N_GUARD::R1(C),XS(f)
      • S(f);N_GUARD::R1(C)
      • S(i);S_CUTR(h)::QAB(A)
      • P(b);S_CUTB(c)::R(B)+K(E)
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