MESON Chess Problem Database

Problem Display
PID: 100979 (8/B1K5/4pQ1R/3k4/6b1/1R4P1/4n3/8 w - - 0 1)

Greenwood, William M

Good Companions, 1920

8/B1K5/4pQ1R/3k4/6b1/1R4P1/4n3/8

#2

6 + 4

14721 Australasian Chess Magazine 1920
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qxe6#
    • 1...Bh5
      • 2.Qxe6#
    • 1...Sc1
      • 2.Qd4#
    • 1...Sg1
      • 2.Qd4#
    • 1...Sc3
      • 2.Qd4#
    • 1...Sxg3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sf4
      • 2.Qd4#
    • 1...e5
      • 2.Qc6#
  • Tries
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qb5#
      • 1...Kxe5!
    • 1.Qf3+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Re3#
        • 2.Rb5#
      • 1...Bxf3!
    • 1.Qf4?
      • threat
        • 2.Rb5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sxf4!
  • Keys
    • 1.Rh4!
      • 1...Kc4
        • 2.Qxe6#
      • 1...Ke4
        • 2.Qxe6#
      • 1...Sxg3
        • 2.Qd4#
      • 1...Bh3
        • 2.Rb5#
      • 1...Bf3
        • 2.Rb5#
      • 1...Bf5
        • 2.Rb5#
      • 1...Bh5
        • 2.Rb5#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sg1
        • 2.Qd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sf4
        • 2.Qd4#
      • 1...e5
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::QAB1(C),XP(d)
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD,XP(B)::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
    • P(d);OGATE,SBLOCK::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(C)
      • Refutation
        • B(b);XQ(C)
    • Try
      • Q(C);
      • Threat
        • R(A)
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • R(D);
    • Vars
      • K(c);P_SPINB(b),S_FLIGHT::QAB(C),XP(d)
      • K(c);P_SPINB(b),S_FLIGHT::QAR2(C),XP(d)
      • S(a);N_GUARD,XP(B)::QAR1(C)
      • B(b);::R(A)
      • S(a);N_GUARD::QAR1(C)
      • S(a);N_GUARD::QAR1(C),XS(a)
      • P(d);OGATE,SBLOCK::QAB1(C)
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