MESON Chess Problem Database

Problem Display
PID: 83492 (4N3/3p4/7p/1KNk2b1/p7/5q2/6Qn/B1R2n2 w - - 0 1)

Ellerman, Arnoldo

2nd HM., Good Companions (March), 1917

4N3/3p4/7p/1KNk2b1/p7/5q2/6Qn/B1R2n2

#2

6 + 8

15 British Chess Magazine 1917
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Be3
      • 2.Qa2#
    • 1...Bf4
      • 2.Qg8#
    • 1...Bf6
      • 2.Qg8#
    • 1...Se3
      • 2.Qd2#
    • 1...Sg4
      • 2.Qxf3#
    • 1...d6
      • 2.Sc7#
  • Tries
    • 1.Qxg5+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...hxg5!
  • Keys
    • 1.Re1!
      • threat
        • 2.Re5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Be3
        • 2.Qa2#
      • 1...Bf4
        • 2.Qg8#
      • 1...Bf6
        • 2.Qg8#
      • 1...Se3
        • 2.Qd2#
      • 1...Sg4
        • 2.Qxf3#
      • 1...d6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATE::QAB1(C),XQ(c)
    • B(f);::QAB(C)
    • B(f);OGATE::QAB(C)
    • S(a);N_GUARD,S_CUTB(f)::QAR(C)
    • S(b);N_GUARD::QAB(C),XQ(c)
    • P(h);SBLOCK::S(F)
  • Tries
    • Try
      • Q(C);CHECK,N_PINQ(c),XB(f)
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAR2(C),XQ(c)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • Q(c);OGATE::QAB1(C),XQ(c)
      • B(f);::QAB(C)
      • B(f);OGATE::QAB(C)
      • S(a);N_GUARD,S_CUTB(f)::QAR(C)
      • S(b);N_GUARD::QAB(C),XQ(c)
      • P(h);SBLOCK::S(F)
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