MESON Chess Problem Database

Problem Display
PID: 187712 (3K4/8/1n6/2pkP2R/2p3Q1/4pN2/4N3/8 w - - 0 1)

Charvat, Prokop

The Houston Post, 1909

3K4/8/1n6/2pkP2R/2p3Q1/4pN2/4N3/8

#2

6 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Kc7?
      • threat
        • 2.Sc3#
        • 2.e6#
      • 1...Sa4
        • 2.e6#
      • 1...Sd7
        • 2.Sc3#
      • 1...c3
        • 2.Sxc3#
        • 2.e6#
      • 1...Sa8+!
    • 1.Sg5?
      • threat
        • 2.Qe6#
        • 2.Qe4#
      • 1...Kxe5
        • 2.Se4#
        • 2.Qe6#
      • 1...Kc6!
    • 1.Qg2?
      • threat
        • 2.Sfd4#
      • 1...Ke4
        • 2.Se1#
      • 1...Kc6
        • 2.Sfd4#
      • 1...Ke6
        • 2.Qg8#
      • 1...c3!
    • 1.Qe4+?
      • 1...Ke6
        • 2.Sg5#
      • 1...Kxe4!
    • 1.Qg6?
      • threat
        • 2.Sc3#
        • 2.Sf4#
      • 1...Sa4
        • 2.Sf4#
      • 1...c3!
  • Keys
    • 1.Rh6!
      • threat
        • 2.Sc3#
        • 2.Rd6#
      • 1...Sa4
        • 2.Rd6#
      • 1...Sc8
        • 2.Sc3#
      • 1...c3
        • 2.Sxc3#
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::R(E)+P(D)
        • S(e);::S(A)
      • Refutation
        • S(e);CHECK
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB(C)+S(B)
      • Vars
        • K(d);S_FLIGHT::QAB(C)+S(B)
        • K(d);S_FLIGHT::QAB(C)+S(B),DCHECK
        • K(d);S_FLIGHT::QAB(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT::S(B)
      • Refutation
        • K(d);S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::S(A)
      • Refutation
        • P(b);
  • Actual
    • R(E);
    • Threat
      • DUALS(2)
    • Vars
      • S(e);::R1(E)
      • S(e);::S(A)
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