MESON Chess Problem Database

Problem Display
PID: 87838 (4r3/4ppRB/1BN5/1p5p/1R2pk1P/2nQ4/b2bq1pK/4N1rn w - - 0 1)

Iwanow, Eugeniusz

Kapica, Ryszard

Szwedowski, Leopold Mieczyslaw

3rd Comm., Buletin Problemistic, 1998-1999

4r3/4ppRB/1BN5/1p5p/1R2pk1P/2nQ4/b2bq1pK/4N1rn

#2

9 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qxd2#
    • 1...Qf3
      • 2.Qxf3#
    • 1...Qg4
      • 2.Qxd2#
    • 1...Be6
      • 2.Bc7#
    • 1...Sf2
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
  • Tries
    • 1.Rxf7+?
      • 1...Kg4
        • 2.Qh3#
      • 1...Bxf7!
    • 1.Qxd2+?
      • 1...Qe3
        • 2.Bxe3#
        • 2.Qxe3#
      • 1...Qxd2!
    • 1.Qd6+?
      • 1...e5
        • 2.Qf6#
        • 2.Qh6#
      • 1...exd6!
    • 1.Qd7?
      • threat
        • 2.Qf5#
      • 1...Qg4
        • 2.Qxd2#
      • 1...Be6
        • 2.Qc7#
      • 1...e6
        • 2.Qxf7#
      • 1...f5
        • 2.Qxf5#
      • 1...Sg3!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qf5#
      • 1...Qg4
        • 2.Sd3#
      • 1...Be6
        • 2.Bc7#
      • 1...Sg3
        • 2.Qxg3#
      • 1...e6
        • 2.Rxf7#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD::QAB(C),XB(d)
    • Q(e);N_GUARD::QAR1(C),XQ(e)
    • B(c);S_CUTP(l)::B(F)
    • S(b);N_GUARD::QAB1(C)
    • S(b);N_GUARD::QAB1(C),XS(b)
  • Tries
    • Try
      • R(H);CHECK,XP(m)
      • Vars
        • K(i);P-FLIGHT::QAB1(C)
      • Refutation
        • B(c);XR(H)
    • Try
      • Q(C);CHECK,XB(d)
      • Refutation
        • Q(e);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(l);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • Q(e);N_GUARD::QAB(C),XB(d)
        • B(c);S_CUTP(l)::QAB(C)
        • P(l);OGATE::QAR(C),XP(m)
        • P(m);::QAR1(C),XP(m)
      • Refutation
        • S(b);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • Q(e);N_GUARD::S(A)
      • B(c);S_CUTP(l)::B(F)
      • S(b);N_GUARD::QAB1(C),XS(b)
      • P(l);S_CUTB(c)::R(H),XP(m)
      • P(m);::QAR1(C),XP(m)
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