MESON Chess Problem Database

Problem Display
PID: 225412 (7K/4p3/4R3/3k4/nP2R3/6p1/1n1N3b/B6Q w - - 0 1)

Brada, Miroslav

Praca, 1997

7K/4p3/4R3/3k4/nP2R3/6p1/1n1N3b/B6Q

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qh5#
    • 1...Sd1
      • 2.R4e5#
    • 1...Sd3
      • 2.R4e5#
    • 1...Sc4
      • 2.R4e5#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Se3#
      • 1...Bg1
        • 2.Qh5#
      • 1...Sc4
        • 2.R4e5#
      • 1...Sd1!
    • 1.Re3+?
      • 1...Kd4
        • 2.Qe4#
      • 1...g2!
    • 1.Qf3?
      • threat
        • 2.Qh5#
        • 2.Qf5#
      • 1...Sd3
        • 2.Re1#
        • 2.Re2#
        • 2.Re3#
        • 2.R4e5#
        • 2.Qxd3#
      • 1...Sc4
        • 2.Re1#
        • 2.Re2#
        • 2.Re3#
        • 2.R4e5#
        • 2.Qd3#
      • 1...g2!
    • 1.Qc1?
      • threat
        • 2.Qc6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sc3!
    • 1.Qd1?
      • threat
        • 2.Qh5#
      • 1...Sxd1
        • 2.R4e5#
      • 1...Sd3
        • 2.Qb3#
      • 1...Sc4
        • 2.Sxc4#
      • 1...g2!
    • 1.Qf1?
      • threat
        • 2.Qf5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qd3#
        • 2.Qxc4#
      • 1...g2!
    • 1.Qg1?
      • threat
        • 2.R4e5#
        • 2.Qd4#
      • 1...g2
        • 2.Qd4#
      • 1...Sd3
        • 2.Qd4#
      • 1...Sc4
        • 2.Qd4#
      • 1...Bxg1!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se3#
      • 1...Sxc4
        • 2.R4e5#
      • 1...Bg1
        • 2.Qh5#
      • 1...Sd1
        • 2.Qxd1#

There are these versions: 23297

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(b);OGATE::QAR(B)
    • S(a);::QAB(B)+R(E),DCHECK
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • B(b);OGATE::QAR(B)
        • S(a);SBLOCK::QAB(B)+R(E),DCHECK
      • Refutation
        • S(a);
    • Try
      • R(E);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(a)::QAR1(B)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(d);N_GUARD::QAR1(B),XS(d)
      • Refutation
        • S(d);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • S(a);XQ(B)::R1(E)
        • S(a);N_GUARD::QAB(B)
        • S(a);N_GUARD::QAR(B)+S(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • S(a);N_GUARD::QAR2(B),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(B)
        • S(a);::QAR1(B)
      • Refutation
        • B(b);XQ(B)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • S(a);SBLOCK,XS(C)::QAB(B)+R(E),DCHECK
      • B(b);OGATE::QAR(B)
      • S(a);N_GUARD::QAR(B),XS(a)
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