MESON Chess Problem Database

Problem Display
PID: 184870 (4R3/1B6/2p1N1p1/4k3/1p3pP1/2p5/2Q5/4K3 w - - 0 1)

Charvat, Prokop

American Chess Bulletin, 1908

4R3/1B6/2p1N1p1/4k3/1p3pP1/2p5/2Q5/4K3

#2

6 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6
        • 2.Qxf4#
      • 1...Kxe4!
    • 1.Qd2?
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Sg5#
      • 1...Kf6
        • 2.Qxf4#
      • 1...c5
        • 2.Qxf4#
      • 1...cxd2+!
    • 1.Qxc3+?
      • 1...Ke4
        • 2.Sc7#
        • 2.Bxc6#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kd6
        • 2.Qd4#
      • 1...bxc3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Sxf4#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6
        • 2.Qxf4#
      • 1...c5
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR2(B)
        • K(d);S_FLIGHT::QAR2(B),XP(c)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(e),XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(e)::R(F)+S(D),DCHECK
        • K(d);S_FLIGHT::QAR2(B),XP(c)
        • P(e);::QAB1(B),XP(c)
      • Refutation
        • P(a);CHECK,XQ(B)
    • Try
      • Q(B);CHECK,XP(a)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(e)::QAR1(B)
        • K(d);S_FLIGHT::QAR2(B)
      • Refutation
        • P(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(d);P-FLIGHT,P_SPINP(e)::R(F)+S(D),XP(c)
      • K(d);P-FLIGHT,P_SPINP(e)::QAR1(B)
      • K(d);S_FLIGHT::QAR2(B)
      • K(d);P_SPINP(c),S_FLIGHT::QAR2(B),XP(c)
      • P(e);::QAB1(B),XP(c)
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