MESON Chess Problem Database

Problem Display
PID: 115725 (8/1n3p2/B4P2/1r3Q2/b1kp4/PN2p3/P7/1NK5 w - - 0 1)

Eriksson, Finn Olof

Vart Hem, 1938

8/1n3p2/B4P2/1r3Q2/b1kp4/PN2p3/P7/1NK5

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb3
      • 2.Bxb5#
      • 2.Qxb5#
    • 1...Sa5
      • 2.Sxa5#
    • 1...Sc5
      • 2.Sa5#
    • 1...Sd6
      • 2.Sa5#
    • 1...Sd8
      • 2.Sa5#
    • 1...e2
      • 2.S3d2#
    • 1...d3
      • 2.Qe4#
  • Tries
    • 1.S1d2+?
      • 1...Kc3
        • 2.Qc2#
      • 1...exd2+!
    • 1.Qc5+?
      • 1...Kd3
        • 2.Qc2#
      • 1...Sxc5!
    • 1.Qe5?
      • threat
        • 2.Qxd4#
      • 1...Bxb3
        • 2.Bxb5#
        • 2.Qxb5#
      • 1...d3
        • 2.Qd4#
        • 2.Qe4#
      • 1...Kd3!
  • Keys
    • 1.Kc2!
      • 1...Bxb3+
        • 2.axb3#
      • 1...d3+
        • 2.Qxd3#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#
      • 1...e2
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 6
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::S(E),XS(f)
    • S(f);N_GUARD::S(E)
    • P(a);N_GUARD::S(E)
    • P(d);OGATEB::QAR2(F)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(c);N_SPINR(e),P-FLIGHT::QAR1(F)
      • Refutation
        • P(a);CHECK,XS(A)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • S(f);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XP(d)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • K(B);P-FLIGHT,P_SPINS(E)
    • Vars
      • B(b);CHECK,OGATE,XS(E)::P(C),XB(b)
      • P(d);CHECK::QAB1(F),XP(d)
      • S(f);N_GUARD::QAR1(F)
      • S(f);N_GUARD::QAR1(F),XS(f)
      • P(a);N_GUARD::S(A)
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