MESON Chess Problem Database

Problem Display
PID: 242329 (Kb4Q1/4R3/7p/p6q/3R1PPn/1rp1Nk2/5p1P/5B2 w - - 0 1)

Morra, Juan Carlos

Norsk Sjakkblad, 1956

Kb4Q1/4R3/7p/p6q/3R1PPn/1rp1Nk2/5p1P/5B2

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Qd5#
      • 2.Qxg4#
    • 1...Qe8
      • 2.Qd5#
    • 1...Qd5+
      • 2.Qxd5#
    • 1...Sf5
      • 2.Qd5#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Be2#
        • 2.Qe2#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qe5
        • 2.Qe2#
      • 1...Be5
        • 2.Qe2#
      • 1...Qb5
        • 2.Be2#
      • 1...Rb2!
  • Keys
    • 1.gxh5!
      • threat
        • 2.Qd5#
        • 2.Qg3#
        • 2.Qg4#
      • 1...Bxf4
        • 2.Qd5#
        • 2.Qg4#
      • 1...Be5
        • 2.Qg3#
      • 1...Rb5
        • 2.Qg3#
        • 2.Qg4#
      • 1...Sf5
        • 2.Qd5#
        • 2.Qg2#
        • 2.Qg4#
      • 1...Sg6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD::QAB(I)
    • Q(g);CHECK,N_GUARD::QAB(I),XQ(g)
    • S(e);S_CUTQ(g)::QAB(I)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,N_GUARD::QAB(I),XQ(g)
        • Q(g);::QAB1(I)
        • B(i);::QAB1(I)
        • Q(g);::B(A)
      • Refutation
        • R(b);
  • Actual
    • P(F);XQ(g)
    • Threat
      • DUALS(3)
    • Vars
      • B(i);::QAR1(I)
      • S(e);::QAB(I)
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