MESON Chess Problem Database

Problem Display
PID: 174923 (1b6/2pK4/4p3/pk6/R1NQ4/pp6/8/8 w - - 0 1)

Prikryl, Bohuzlav

Dom i Svet, 1901

1b6/2pK4/4p3/pk6/R1NQ4/pp6/8/8

#2

4 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa4
      • 2.Sd6#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...Kxa4
        • 2.Qxa5#
      • 1...Kc5
        • 2.Rxa5#
        • 2.Qe5#
      • 1...Ka6!
    • 1.Qb6+?
      • 1...Kxa4
        • 2.Qxa5#
      • 1...cxb6!
    • 1.Qa7?
      • threat
        • 2.Qxa5#
      • 1...Kxa4
        • 2.Qxa5#
      • 1...Bxa7!
    • 1.Qd5+?
      • 1...Kxa4
        • 2.Qxa5#
      • 1...Ka6
        • 2.Rxa5#
      • 1...c5
        • 2.Qc6#
      • 1...exd5!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qc6#
      • 1...Kxa4
        • 2.Sd6#
      • 1...Kc5
        • 2.Qe5#
      • 1...Ka6
        • 2.Rxa5#
      • 1...c6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT,XR(A)::QAR(C)+S(B)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);S_FLIGHT,XR(A)::QAR1(C),XP(c)
      • Refutation
        • K(d);P_SPINP(c),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(A)::QAR1(C),XP(c)
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • K(d);P_SPINP(c),S_FLIGHT,XR(A)::QAR1(C),XP(c)
      • Refutation
        • B(g);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT,XR(A)::QAR1(C),XP(c)
        • K(d);P_SPINP(c),S_FLIGHT::R1(A),XP(c)
        • P(f);P_SPINP(f)::QAB1(C)
      • Refutation
        • P(e);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(d);S_FLIGHT,XR(A)::QAR(C)+S(B)
      • K(d);P-FLIGHT::QAR2(C)
      • K(d);P_SPINP(c),S_FLIGHT::R1(A),XP(c)
      • P(f);::QAB1(C),XP(f)
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