MESON Chess Problem Database

Problem Display
PID: 225519 (b7/3p1B2/1R1pr3/1npk4/Rn1P1B2/3P4/3K4/6Q1 w - - 0 1)

Hronec, Jaroslav

Praca, 1955

b7/3p1B2/1R1pr3/1npk4/Rn1P1B2/3P4/3K4/6Q1

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qh1#
      • 2.Qg2#
      • 2.Qg5#
    • 1...Sc2
      • 2.Qh1#
      • 2.Qg2#
      • 2.Qg5#
    • 1...Sxd3
      • 2.Qh1#
      • 2.Qg2#
    • 1...Sa6
      • 2.Qh1#
      • 2.Qg2#
      • 2.Qg5#
    • 1...Sc6
      • 2.Qh1#
      • 2.Qg2#
    • 1...Sa3
      • 2.Rxd6#
    • 1...Sc3
      • 2.Rxd6#
    • 1...Sxd4
      • 2.Rxd6#
    • 1...Sa7
      • 2.Rxd6#
    • 1...Sc7
      • 2.Rxd6#
    • 1...cxd4
      • 2.Qg5#
  • Tries
    • 1.Be3?
      • threat
        • 2.Qh1#
        • 2.Qg2#
        • 2.Qg5#
      • 1...Sxd3
        • 2.Qh1#
        • 2.Qg2#
      • 1...cxd4
        • 2.Qg5#
      • 1...Sc6
        • 2.Qh1#
        • 2.Qg2#
      • 1...Sc3
        • 2.Qg5#
      • 1...Sxd4!
    • 1.Rxb4?
      • threat
        • 2.Qh1#
        • 2.Qg2#
        • 2.Qg5#
      • 1...Sxd4
        • 2.Rxd6#
      • 1...cxd4
        • 2.R4xb5#
        • 2.Qg5#
      • 1...Sc3
        • 2.Rxd6#
        • 2.Qg5#
      • 1...c4
        • 2.R4xb5#
      • 1...cxb4!
    • 1.Qe3?
      • threat
        • 2.Qe4#
      • 1...Sxd3
        • 2.Qf3#
      • 1...Sc3
        • 2.Rxd6#
      • 1...cxd4!
    • 1.Qg6?
      • threat
        • 2.Qe4#
      • 1...Sxd3
        • 2.Qg2#
      • 1...cxd4
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Sc3
        • 2.Rxd6#
      • 1...Kxd4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc4#
      • 1...Kxd4
        • 2.Qc4#
      • 1...Sxd3
        • 2.Qh1#
      • 1...Sc2
        • 2.Qh1#
      • 1...Sa3
        • 2.Rxd6#
      • 1...Sc3
        • 2.Rxd6#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::R1(G),XP(e)
    • S(b);N_GUARD,XP(E)::R1(G),XP(e)
    • P(c);SBLOCK,XP(E)::QAR(A)
  • Tries
    • Try
      • B(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);XP(E)::QAR(A)
        • S(b);::QAR(A)
      • Refutation
        • S(b);XP(E)
    • Try
      • R(D);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • S(b);N_GUARD,XP(E)::R1(G),XP(e)
        • P(c);OGATEB::R(D),XS(b)
      • Refutation
        • P(c);XR(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);XP(C)::QAB(A)
        • S(b);N_GUARD::R1(G),XP(e)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);XP(C)::QAB(A)
        • S(b);N_GUARD::R1(G),XP(e)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT,P_SPINS(a),XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(d);N_SPINR(f),P-FLIGHT,P_SPINS(a),XP(E)::QAR1(A)
      • S(a);XP(C)::QAB(A)
      • S(a);::QAB(A)
      • S(b);N_GUARD::R1(G),XP(e)
      • P(c);::QAB1(A),XP(c)
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