MESON Chess Problem Database

Problem Display
PID: 95231 (8/2p3p1/1p4p1/4kpPb/2Q5/1N1R2p1/K5n1/8 w - - 0 1)

Bobrov, Pavel Pavlovich

Deutsches Wochenschach, 1899

8/2p3p1/1p4p1/4kpPb/2Q5/1N1R2p1/K5n1/8

#2

5 + 9

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qd5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Sd7#
        • 2.Rd5#
        • 2.Qd4#
      • 1...f4
        • 2.Rd5#
        • 2.Qd5#
        • 2.Qe6#
        • 2.Qe4#
      • 1...Bf3
        • 2.Sd7#
        • 2.Qd4#
      • 1...Se3
        • 2.Sd7#
        • 2.Qd4#
      • 1...Sf4
        • 2.Sd7#
        • 2.Qc3#
        • 2.Qd4#
      • 1...c6
        • 2.Sd7#
        • 2.Qd4#
      • 1...bxc5!
    • 1.Re3+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Sxe3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sc6#
      • 1...Ke4
        • 2.Sf3#
        • 2.Sc6#
      • 1...Kf4
        • 2.Sf3#
      • 1...Kd6
        • 2.Sc6#
      • 1...Bf3
        • 2.Sxf3#
      • 1...f4
        • 2.Qe6#
      • 1...c6
        • 2.Sxc6#

This anticipates 9707(1908)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::QAR1(D)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(3)
      • Refutation
        • P(f);XS(B)
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(D)
      • Refutation
        • S(a);XR(C)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(c);S_FLIGHT::QAR(D)+S(B)
      • K(c);S_FLIGHT::R(C)+S(B)
      • B(e);N_GUARD::S(B),XB(e)
      • P(d);SBLOCK::QAR1(D)
      • P(h);::S(B),XP(h)
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