MESON Chess Problem Database

Problem Display
PID: 153518 (8/3p4/Kp1k1Pp1/n1R3P1/pQn2N2/r7/r3N2B/5b2 w - - 0 1)

Ellerman, Arnoldo

Good Companions (February), 1916

8/3p4/Kp1k1Pp1/n1R3P1/pQn2N2/r7/r3N2B/5b2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qd4#
    • 1...Sd2
      • 2.Qd4#
    • 1...Se5
      • 2.Rc1#
      • 2.Rc2#
      • 2.Rc3#
      • 2.Rc4#
      • 2.Rc8#
      • 2.Qd4#
  • Tries
    • 1.Qxb6+?
      • 1...Sc6
        • 2.Rd5#
      • 1...Sxb6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sb5#
      • 1...Sb2+
        • 2.Sd3#
      • 1...Sd2+
        • 2.Sd3#
      • 1...Se3+
        • 2.Sfe2#
      • 1...Se5+
        • 2.Rc4#
      • 1...bxc5
        • 2.Qb8#
      • 1...b5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(e);OGATE,P_PINS(A)::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK,XP(g)
      • Vars
        • S(f);P_SPINS(f)::R1(E)
      • Refutation
        • S(e);P_PINS(A),XQ(C)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • S(e);CHECK,N_GUARD,S_CUTR(b)::B(B)+S(D)
      • S(e);CHECK,N_GUARD,S_CUTR(c)::B(B)+S(D)
      • S(e);CHECK,SBLOCK::QAB(C)+R(E)
      • P(g);OGATE,P_SPINP(g),SBLOCK,XR(E)::QAB(C)
      • P(g);::S(A),XP(g)
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