MESON Chess Problem Database

Problem Display
PID: 177405 (K2N1Q1b/4P1rr/6kp/7p/2pp3P/np3p2/1Bq3b1/RB4R1 w - - 0 1)

Mendes de Moraes Filho, Feliciano

Busmen's Chess Review, 1962

K2N1Q1b/4P1rr/6kp/7p/2pp3P/np3p2/1Bq3b1/RB4R1

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4+
      • 2.Bxe4#
    • 1...Qf5
      • 2.Bxf5#
      • 2.Qxf5#
    • 1...Sxb1
      • 2.Ra6#
    • 1...f2+
      • 2.Rxg2#
    • 1...d3
      • 2.Qf6#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sf4#
      • 1...Qe4+
        • 2.Bxe4#
      • 1...f2+
        • 2.Rxg2#
      • 1...Rf7!
    • 1.Bxc2+?
      • 1...Sxc2
        • 2.Ra6#
      • 1...d3
        • 2.Qf6#
      • 1...bxc2!
  • Keys
    • 1.Qxf3!
      • threat
        • 2.Rxg2#
      • 1...Qe4+
        • 2.Bxe4#
      • 1...Sxb1
        • 2.Ra6#
      • 1...Qf5
        • 2.Qc6#
      • 1...d3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(a);CHECK,OGATE::B(B),XQ(a)
    • S(c);N_SPINQ(a),OGATE,XB(B)::R(A)
    • P(e);CHECK,N_GUARD::R(C),XB(b)
    • P(g);N_SPINQ(a)::QAR1(I)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • Q(a);CHECK,OGATE::B(B),XQ(a)
        • P(e);CHECK,N_GUARD::R(C),XB(b)
      • Refutation
        • R(k);
    • Try
      • B(B);CHECK,XQ(a)
      • Vars
        • S(c);OGATE,XB(B)::R(A)
        • P(g);P_SPINP(g)::QAR1(I)
      • Refutation
        • P(d);XB(B)
  • Actual
    • Q(I);P_SPINQ(I),XP(e)
    • Threat
      • R(C),XB(b)
    • Vars
      • Q(a);CHECK,N_PINQ(I),OGATE::B(B),XQ(a)
      • S(c);N_SPINQ(a),OGATE,XB(B)::R(A)
      • Q(a);::QAR(I)
      • P(g);N_SPINQ(a),S_CUTQ(a)::QAB(I)
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