MESON Chess Problem Database

Problem Display
PID: 243930 (8/8/8/BR2K3/P1k1pp2/1N2q3/7Q/1b2N3 w - - 0 1)

Fleck, Ferenc

Magyar Sakkelet, 1971

8/8/8/BR2K3/P1k1pp2/1N2q3/7Q/1b2N3

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sd2#
    • 1...Qd2
      • 2.Sxd2#
    • 1...Qb6
      • 2.Sd2#
    • 1...Qa7
      • 2.Sd2#
    • 1...Qf3
      • 2.Sd2#
    • 1...Qg3
      • 2.Sd2#
    • 1...Qh3
      • 2.Sd2#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg8#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qc5+
        • 2.Qxc5#
      • 1...Qxg1
        • 2.Sd2#
      • 1...Qxe1
        • 2.Qd4#
      • 1...Qd2
        • 2.Sxd2#
        • 2.Qc5#
      • 1...Qb6
        • 2.Sd2#
      • 1...Qa7
        • 2.Sd2#
      • 1...Qd3
        • 2.Qc5#
      • 1...Qg3
        • 2.Sd2#
        • 2.Qd4#
        • 2.Qc5#
      • 1...Qh3
        • 2.Sd2#
        • 2.Qd4#
        • 2.Qc5#
      • 1...Qc3+!
    • 1.Qc2+?
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Bxc2!
    • 1.Qd2?
      • threat
        • 2.Rb4#
        • 2.Qb4#
        • 2.Qd5#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qxd2
        • 2.Sxd2#
      • 1...Qxe1
        • 2.Rb4#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Qxb3
        • 2.Qd4#
        • 2.Qd5#
      • 1...Qb6
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qd5#
      • 1...Qd3
        • 2.Rb4#
        • 2.Qb4#
      • 1...Bd3
        • 2.Rb4#
        • 2.Qc3#
        • 2.Qb4#
      • 1...Qc5+!
    • 1.Qh3?
      • threat
        • 2.Qe6#
      • 1...Qc5+
        • 2.Rxc5#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qxe1
        • 2.Rc5#
      • 1...Qxh3
        • 2.Sd2#
      • 1...Qd2
        • 2.Sxd2#
        • 2.Rc5#
        • 2.Qc8#
      • 1...Qb6
        • 2.Sd2#
        • 2.Qc3#
      • 1...Qd3
        • 2.Qc8#
      • 1...Qd4+!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Rb4#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qc5+
        • 2.Rxc5#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qxe1
        • 2.Qd4#
      • 1...Qxb3
        • 2.Qd4#
        • 2.Qxb3#
      • 1...Qd2
        • 2.Sxd2#
        • 2.Rc5#
      • 1...Qb6
        • 2.Sd2#
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD::S(C)
    • Q(b);N_GUARD::S(C),XQ(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • Q(b);CHECK,OGATE::QAR1(B),XQ(b)
        • Q(b);N_GUARD,XQ(B)::S(C)
        • Q(b);OGATE,XS(A)::QAR1(B)
        • Q(b);N_GUARD::S(C)
        • Q(b);OGATE::QAR1(B)
      • Refutation
        • Q(b);CHECK
    • Try
      • Q(B);CHECK
      • Vars
        • Q(b);CHECK,N_GUARD,P_SPINQ(b)::QAR1(B),XQ(b)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);CHECK,N_GUARD::QAR1(B),XQ(b)
        • Q(b);XQ(B)::S(C),XQ(b)
      • Refutation
        • Q(b);CHECK
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • Q(b);CHECK,N_GUARD::R1(F),XQ(b)
        • Q(b);CHECK,OGATE::QAR1(B),XQ(b)
        • Q(b);N_GUARD,XS(A)::R1(F)
        • Q(b);N_GUARD,XQ(B)::S(C)
        • Q(b);N_GUARD::QAR(B)
      • Refutation
        • Q(b);CHECK
  • Actual
    • Q(B);
    • Threat
      • R1(F)
    • Vars
      • Q(b);CHECK,N_GUARD::QAR1(B),XQ(b)
      • Q(b);CHECK,N_GUARD::R1(F),XQ(b)
      • Q(b);N_GUARD,XS(A)::QAR1(B)
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