MESON Chess Problem Database

Problem Display
PID: 94520 (2b4K/2Q5/p7/1k6/8/5B2/N7/8 w - - 0 1)

Bosch, Bedrich

Casopis ceskoslovenskych sachistu, 1906

2b4K/2Q5/p7/1k6/8/5B2/N7/8

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Qc6#
  • Tries
    • 1.Qa5+?
      • 1...Kc4
        • 2.Qd5#
      • 1...Kxa5!
    • 1.Qc3?
      • threat
        • 2.Qb4#
      • 1...Ka4
        • 2.Bc6#
        • 2.Qb4#
      • 1...a5
        • 2.Qc6#
      • 1...Kb6!
    • 1.Qc5+?
      • 1...Ka4
        • 2.Bd1#
        • 2.Qb4#
      • 1...Kxc5!
    • 1.Qb7+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qd5#
      • 1...Ka5
        • 2.Qb4#
      • 1...Kc5
        • 2.Qb4#
      • 1...Bxb7!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qd5#
      • 1...Ka5
        • 2.Qb4#
      • 1...a5
        • 2.Qc6#

This anticipates 149552(1912)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • B(c);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::QAB1(C)
      • P(b);SBLOCK::QAB1(C)
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