MESON Chess Problem Database

Problem Display
PID: 93875 (8/8/1p6/p2Pp3/B2kNp2/QK3P2/8/2N5 w - - 0 1)

Ruszczynski, Piotr

Sachove umeni (Ceskoslovensky sach), 1969

8/8/1p6/p2Pp3/B2kNp2/QK3P2/8/2N5

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Kc4#
    • 1...Kxd5
      • 2.Qd6#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Bb5?
      • 1...Ke3
        • 2.Kc4#
      • 1...Kxd5
        • 2.Qd6#
      • 1...a4+!
    • 1.Bc6?
      • 1...Ke3
        • 2.Kc4#
      • 1...b5
        • 2.Qc5#
      • 1...a4+!
    • 1.Bd7?
      • 1...Ke3
        • 2.Kc4#
      • 1...Kxd5
        • 2.Qd6#
      • 1...b5
        • 2.Qc5#
      • 1...a4+!
    • 1.Be8?
      • 1...Ke3
        • 2.Kc4#
      • 1...Kxd5
        • 2.Qd6#
      • 1...b5
        • 2.Qc5#
      • 1...a4+!
    • 1.Qb2+?
      • 1...Ke3
        • 2.Qc3#
        • 2.Qf2#
      • 1...Kxd5!
    • 1.Qb4+?
      • 1...Ke3
        • 2.Qc3#
      • 1...Kxd5
        • 2.Qd6#
        • 2.Qc4#
      • 1...axb4!
    • 1.Qd6?
      • 1...b5
        • 2.Qc5#
      • 1...Ke3!
    • 1.Qe7?
      • 1...Kxd5
        • 2.Qd6#
        • 2.Qd7#
      • 1...b5
        • 2.Qc5#
      • 1...Ke3!
    • 1.Qf8?
      • 1...Kxd5
        • 2.Qd6#
      • 1...b5
        • 2.Qc5#
      • 1...Ke3!
    • 1.Qa1+?
      • 1...Ke3
        • 2.Qc3#
      • 1...Kxd5!
    • 1.d6?
      • 1...Ke3
        • 2.Kc4#
      • 1...b5
        • 2.Qc5#
      • 1...Kd5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qd2#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kxd5
        • 2.Kc3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR(B)+K(C)
    • K(a);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
    • P(e);N_GUARD::QAB1(B)
  • Tries
    • Try
      • B(E);
      • Vars
        • K(a);S_FLIGHT::QAR(B)+K(C)
        • K(a);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
      • Refutation
        • P(c);CHECK
    • Try
      • B(E);
      • Vars
        • K(a);S_FLIGHT::QAR(B)+K(C)
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • P(c);CHECK
    • Try
      • B(E);
      • Vars
        • K(a);S_FLIGHT::QAR(B)+K(C)
        • K(a);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • P(c);CHECK
    • Try
      • B(E);
      • Vars
        • K(a);S_FLIGHT::QAR(B)+K(C)
        • K(a);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(G)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,XP(G)
    • Try
      • P(G);
      • Vars
        • K(a);S_FLIGHT::QAR(B)+K(C)
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT,XP(G)::QAB(B)+K(C)
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