MESON Chess Problem Database

Problem Display
PID: 181067 (1N6/5K2/3p4/n1k5/pR6/1p6/1P1Q4/6b1 w - - 0 1)

Dobrusky, Jan

Nove parizske mody, 1904

1N6/5K2/3p4/n1k5/pR6/1p6/1P1Q4/6b1

#2

5 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Sc6
      • 2.Sa6#
      • 2.Sd7#
  • Tries
    • 1.Rb5+?
      • 1...Kc4
        • 2.Qd5#
      • 1...Kxb5!
    • 1.Qc1+?
      • 1...Kd5
        • 2.Qg5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kxb4!
    • 1.Qc3+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kd5!
    • 1.Qg5+?
      • 1...d5
        • 2.Qe7#
      • 1...Kxb4!
    • 1.Qd3?
      • threat
        • 2.Rb5#
        • 2.Qb5#
      • 1...Kxb4
        • 2.Sa6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...d5!
    • 1.Qd5+?
      • 1...Kxb4
        • 2.Sa6#
      • 1...Kxd5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qb5#
      • 1...Kxb4
        • 2.Sa6#
      • 1...Kd5
        • 2.Qh5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...d5
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(B)
      • Refutation
        • K(e);P-FLIGHT,XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR(B)
        • S(d);N_GUARD,P_SPINS(d)::QAR1(B),XS(d)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR1(B),XS(d)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • P(f);OGATEB,P_SPINP(f),SBLOCK::QAB(B)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT,XR(C)::S(E)
        • S(d);N_GUARD::QAR1(B),XS(d)
      • Refutation
        • P(f);
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(C)::S(E)
      • Refutation
        • K(e);P-FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(e);S_FLIGHT,XR(C)::S(E)
      • K(e);P-FLIGHT::QAR(B)
      • S(d);N_GUARD::QAR1(B),XS(d)
      • P(f);OGATEB,SBLOCK::QAB(B)
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