MESON Chess Problem Database

Problem Display
PID: 273512 (8/1K2pq1b/p1P1p3/Rp2k2p/2PpNR2/B6N/1r5Q/1r6 w - - 0 1)

Mendes de Moraes Filho, Feliciano

British Chess Magazine, 1934

8/1K2pq1b/p1P1p3/Rp2k2p/2PpNR2/B6N/1r5Q/1r6

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qxf4#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sxf7#
        • 2.Rf5#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Rxh2
        • 2.Sxf7#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Bf5
        • 2.Rxf5#
      • 1...Qg6
        • 2.Rf5#
      • 1...Qe8
        • 2.Rf2#
        • 2.Rf5#
      • 1...Qg8
        • 2.Rf5#
      • 1...Qf6
        • 2.Re4#
        • 2.Rf5#
      • 1...Qg7
        • 2.Rf5#
      • 1...Qf8
        • 2.Rf5#
      • 1...Bg6
        • 2.Rf5#
      • 1...Bg8
        • 2.Rf5#
      • 1...d3
        • 2.Sxf7#
      • 1...exd6+!
    • 1.Rf2+?
      • 1...Qf4
        • 2.Qxf4#
      • 1...Kxe4!
    • 1.Rf3+?
      • 1...Kxe4
        • 2.Sg5#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Rxh2!
    • 1.Rg4+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Rxh2!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sd7#
      • 1...bxc4+
        • 2.Sb3#
      • 1...Kd6
        • 2.Rxd4#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Qe8
        • 2.Rf2#
      • 1...Rb4
        • 2.Rxf7#
      • 1...b4
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(j);OGATE,P_SPINQ(j),XR(F)::QAB1(A),XQ(j)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);OGATE,P_SPINQ(j),XR(F)::QAB1(A),XQ(j)
        • R(b);XQ(A)::S(E),XQ(j)
        • Q(j);::QAB(A)+R(F),DCHECK,XQ(j)
        • B(k);::QAB(A)+R(F),DCHECK,XB(k)
        • Q(j);::QAB(A)+R(F),DCHECK
        • B(k);::QAB(A)+R(F),DCHECK
        • P(c);::S(E),XQ(j)
      • Refutation
        • P(i);CHECK,XS(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::QAB1(A),XQ(j)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,XS(E)
    • Try
      • R(F);CHECK
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT,S_CUTQ(j),S_CUTR(b),XS(E)::S(C)
        • Q(j);N_GUARD,P_SPINQ(j)::QAB1(A),XQ(j)
      • Refutation
        • R(b);XQ(A)
    • Try
      • R(F);CHECK
      • Vars
        • K(e);P-FLIGHT,S_CUTQ(j)::QAR1(A)
        • Q(j);N_GUARD,P_SPINQ(j)::QAB1(A),XQ(j)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • S(E);N_PINP(d)
    • Threat
      • S(E)
    • Vars
      • P(d);CHECK,XP(D)::R(G)+S(E)
      • K(e);N_GUARD,S_FLIGHT::QAB(A)+R(F),DCHECK,XP(c)
      • Q(j);OGATE,P_SPINQ(j),XR(F)::QAB1(A),XQ(j)
      • Q(j);N_GUARD::QAB(A)+R(F)
      • R(b);N_GUARD::QAB(A)+R(F),XQ(j)
      • P(d);::R(G)+S(E)
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