MESON Chess Problem Database

Problem Display
PID: 187751 (K3R3/1Np5/1pk5/7Q/6P1/p1N5/6q1/4rb2 w - - 0 1)

Charvat, Prokop

The Houston Post, 1909

K3R3/1Np5/1pk5/7Q/6P1/p1N5/6q1/4rb2

#2

6 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qg1
      • 2.Qd5#
    • 1...Qb2
      • 2.Qd5#
    • 1...Qc2
      • 2.Qd5#
    • 1...Qe2
      • 2.Qd5#
    • 1...Qf2
      • 2.Qd5#
    • 1...Qh2
      • 2.Qd5#
    • 1...Qg3
      • 2.Qd5#
    • 1...Qxg4
      • 2.Qd5#
    • 1...Re2
      • 2.Qb5#
    • 1...Re4
      • 2.Qd5#
    • 1...Rxe8+
      • 2.Qxe8#
    • 1...Bb5
      • 2.Qxb5#
  • Tries
    • 1.Re6+?
      • 1...Kd7
        • 2.Qe8#
      • 1...Rxe6!
    • 1.Qg6+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Kd7!
    • 1.Qh6+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Kd7!
  • Keys
    • 1.Re2!
      • threat
        • 2.Qe8#
        • 2.Qb5#
      • 1...Kd7
        • 2.Qe8#
      • 1...Qxe2
        • 2.Qd5#
      • 1...Qxg4
        • 2.Qb5#
        • 2.Qd5#
      • 1...Rxe2
        • 2.Qb5#
      • 1...Bxe2
        • 2.Qe8#
      • 1...b5
        • 2.Qxb5#
      • 1...Qe4
        • 2.Qb5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Rb1
        • 2.Qe8#
      • 1...Rd1
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD::QAB1(C)
    • Q(c);N_GUARD::QAB1(C),XQ(c)
    • Q(c);N_GUARD,XP(B)::QAB1(C)
    • R(a);S_CUTB(b)::QAB1(C)
    • R(a);S_CUTQ(c)::QAB1(C)
    • R(a);CHECK,OGATE,XR(F)::QAB(C),XR(a)
    • B(b);N_GUARD::QAB1(C),XB(b)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(f);P_PINS(D),S_FLIGHT::QAB1(C)
      • Refutation
        • R(a);XR(F)
    • Try
      • Q(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(C),XR(a)
      • Refutation
        • K(f);P_PINS(D),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(C),XR(a)
      • Refutation
        • K(f);P_PINS(D),S_FLIGHT
  • Actual
    • R(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);P_PINS(D),S_FLIGHT::QAB1(C)
      • Q(c);N_GUARD,XR(F)::QAB1(C)
      • R(a);XR(F)::QAB1(C)
      • B(b);XR(F)::QAB(C)
      • P(e);::QAB1(C),XP(e)
      • Q(c);::QAB1(C)
      • Q(c);N_GUARD::QAB1(C),XQ(c)
      • R(a);::QAB(C)
      • R(a);::QAB1(C)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).