MESON Chess Problem Database

Problem Display
PID: 137434 (8/2p2R2/p2k4/K7/2Q5/5N2/8/8 w - - 0 1)

Speckmann, Werner

Problemas, 1969

8/2p2R2/p2k4/K7/2Q5/5N2/8/8

#2

4 + 3

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Qd3+?
      • 1...Kc5
        • 2.Rxc7#
      • 1...Ke6
        • 2.Qd7#
      • 1...Kc6!
    • 1.Qb5?
      • 1...Ke6
        • 2.Qd7#
      • 1...c5
        • 2.Qd7#
      • 1...c6
        • 2.Qe5#
      • 1...axb5!
    • 1.Qe6+?
      • 1...Kc5
        • 2.Rf5#
        • 2.Rxc7#
      • 1...Kxe6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Sg5#
        • 2.Qd7#
      • 1...Kc6!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Sg5#
      • 1...Kxc5!
    • 1.Qxc7+?
      • 1...Ke6
        • 2.Qd7#
      • 1...Kd5!
  • Keys
    • 1.Sg5!
      • 1...Ke5
        • 2.Qc5#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::R(D),XP(c)
        • K(b);OGATE,P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::S(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(b);S_FLIGHT::QAR2(B)
      • P(c);SBLOCK::QAR1(B)
      • P(c);SBLOCK::QAR2(B)
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