MESON Chess Problem Database

Problem Display
PID: 239908 (2R2r2/Q7/8/N2pP3/Kp3p2/2bk1P2/5RN1/nr1B4 w - - 0 1)

Ellerman, Arnoldo

Sinfonie Scacchistiche, 1966

2R2r2/Q7/8/N2pP3/Kp3p2/2bk1P2/5RN1/nr1B4

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc8
      • 2.Sxf4#
    • 1...Rd8
      • 2.Sxf4#
    • 1...Re8
      • 2.Sxf4#
    • 1...Rg8
      • 2.Sxf4#
    • 1...Rh8
      • 2.Sxf4#
    • 1...Be1
      • 2.Sxe1#
    • 1...Bb2
      • 2.Se1#
    • 1...Bd2
      • 2.Be2#
    • 1...Bd4
      • 2.Qa6#
    • 1...Bxe5
      • 2.Se1#
    • 1...Sc2
      • 2.Bxc2#
    • 1...Sb3
      • 2.Bc2#
    • 1...d4
      • 2.Qa6#
  • Tries
    • 1.Rxc3+?
      • 1...bxc3
        • 2.Se1#
      • 1...Kxc3!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qa6#
      • 1...Kc4
        • 2.Be2#
      • 1...Bxe5
        • 2.Sxe5#
      • 1...Be1
        • 2.Qd4#
      • 1...Bb2
        • 2.Sxb4#
      • 1...Bd2
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(h);N_GUARD,XR(I)::S(C),XP(f)
    • R(h);N_GUARD::S(C),XP(f)
    • B(c);N_GUARD::S(C),XB(c)
    • B(c);N_GUARD::S(C)
    • B(c);SBLOCK::B(A)
    • B(c);SBLOCK::QAB(H)
    • B(c);N_GUARD,XP(G)::S(C)
    • S(a);N_GUARD::B(A),XS(a)
    • S(a);N_GUARD::B(A)
    • P(g);SBLOCK::QAB(H)
  • Tries
    • Try
      • R(I);CHECK,XB(c)
      • Vars
        • P(e);SBLOCK,XR(I)::S(C)
      • Refutation
        • K(d);P-FLIGHT,XR(I)
  • Actual
    • S(F);
    • Threat
      • QAB(H)
    • Vars
      • K(d);S_FLIGHT::B(A)
      • B(c);XP(G)::S(F),XB(c)
      • B(c);N_GUARD::QAR1(H)
      • B(c);N_GUARD,S_CUTR(b)::S(F),XP(e)
      • B(c);N_GUARD::QAR1(H),XB(c)
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