MESON Chess Problem Database

Problem Display
PID: 101062 (K7/4nN2/1Pk5/4R3/8/nrp4B/2N1Q3/6Bb w - - 0 1)

Lindmark, CE

Good Companions, 1918

K7/4nN2/1Pk5/4R3/8/nrp4B/2N1Q3/6Bb

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sxb4#
    • 1...Rxb6
      • 2.Rc5#
    • 1...Sb1
      • 2.Qc4#
    • 1...Sxc2
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sb5
      • 2.Qc4#
  • Tries
    • 1.Re6+?
      • 1...Kd5
        • 2.Rd6#
        • 2.Qd3#
      • 1...Kd7+!
    • 1.Qg4?
      • threat
        • 2.Qe6#
        • 2.Qd7#
      • 1...Rxb6
        • 2.Rc5#
        • 2.Qd7#
      • 1...Bd5
        • 2.Qd7#
      • 1...Sd5
        • 2.Qd7#
      • 1...Sc4
        • 2.Qd7#
        • 2.Qxc4#
      • 1...Sb5
        • 2.Qd7#
        • 2.Qc4#
      • 1...Sc8
        • 2.Qd7#
        • 2.Qxc8#
      • 1...Sf5!
    • 1.Qf2?
      • threat
        • 2.Qc5#
        • 2.Qf6#
      • 1...Rxb6
        • 2.Rc5#
        • 2.Qc5#
        • 2.Qxb6#
      • 1...Bd5
        • 2.Qc5#
      • 1...Sd5
        • 2.Qc5#
      • 1...Rb5
        • 2.Qf6#
      • 1...Bf3
        • 2.Qc5#
      • 1...Sc4
        • 2.Qc5#
      • 1...Sb5
        • 2.Qc5#
      • 1...Sc8
        • 2.Qc5#
      • 1...Sg8
        • 2.Qc5#
      • 1...Sf5!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Sd4#
      • 1...Rxb5
        • 2.Qe6#
      • 1...Sxc2
        • 2.Qc4#
      • 1...Sxb5
        • 2.Qc4#
      • 1...Sf5
        • 2.Qe8#
      • 1...Rb4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::S(B),XR(c)
    • R(c);SBLOCK,XP(F)::R1(E)
    • S(b);N_GUARD::QAR2(C)
    • S(b);N_GUARD,XS(B)::QAR2(C)
    • S(b);N_GUARD::QAR2(C),XS(b)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(e);CHECK,S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(C)
        • S(f);::QAB1(C)
      • Refutation
        • S(f);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR1(C)
        • S(f);::QAR1(C)
        • R(c);::QAR(C)
        • S(b);::QAR1(C)
      • Refutation
        • S(f);
  • Actual
    • R(E);
    • Threat
      • S(B)
    • Vars
      • R(c);SBLOCK,XR(E)::QAR2(C)
      • S(b);N_GUARD,XS(B)::QAR2(C)
      • S(b);N_GUARD,XR(E)::QAR2(C)
      • S(f);OGATE::QAB(C)
      • R(c);N_GUARD::S(B),XR(c)
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