MESON Chess Problem Database

Problem Display
PID: 234154 (3R4/2K1Bb1q/2p4p/2NPkBP1/2rNp1n1/6P1/1n1Q4/8 w - - 0 1)

Ellerman, Arnoldo

Sahs, 1967

3R4/2K1Bb1q/2p4p/2NPkBP1/2rNp1n1/6P1/1n1Q4/8

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Sxc6#
    • 1...Rxd4
      • 2.Qf4#
    • 1...Bxd5
      • 2.Sd7#
    • 1...Sf2
      • 2.Bf6#
    • 1...Sh2
      • 2.Bf6#
    • 1...Se3
      • 2.Bf6#
    • 1...Sf6
      • 2.Bxf6#
    • 1...cxd5
      • 2.Bd6#
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxe4#
      • 1...Qxf5
        • 2.Sxc6#
      • 1...Rxd4
        • 2.Qf4#
      • 1...Bxd5
        • 2.Sd7#
      • 1...Sxe3
        • 2.Bf6#
      • 1...cxd5
        • 2.Bd6#
      • 1...Sf2
        • 2.Bf6#
      • 1...Sf6
        • 2.Bxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(i);SBLOCK,XB(F)::S(C),XP(f)
    • R(b);SBLOCK,XS(C)::QAB1(A)
    • B(h);P_PINB(I),SBLOCK,XP(E)::S(D)
    • S(d);N_GUARD::B(I)
    • S(d);N_GUARD::B(I),XS(d)
    • P(f);P_PINS(D),SBLOCK,XP(E)::B(I)
  • Actual
    • Q(A);P_PINP(c)
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • Q(i);SBLOCK,XB(F)::S(C),XP(f)
      • R(b);SBLOCK,XS(C)::QAB1(A)
      • B(h);P_PINB(I),SBLOCK,XP(E)::S(D)
      • S(d);N_GUARD,N_SPINP(c),XQ(A)::B(I)
      • P(f);P_PINS(D),SBLOCK,XP(E)::B(I)
      • S(d);N_GUARD::B(I)
      • S(d);N_GUARD::B(I),XS(d)
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