MESON Chess Problem Database

Problem Display
PID: 109885 (8/3N4/b2p1Ppb/2pk4/3N1R2/1p1r1p1K/3Q4/2R3BB w - - 0 1)

Mendes de Moraes Filho, Feliciano

British Chess Magazine, 1934

8/3N4/b2p1Ppb/2pk4/3N1R2/1p1r1p1K/3Q4/2R3BB

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Bxf3#
  • Tries
    • 1.Qxd3?
      • threat
        • 2.Bxf3#
        • 2.Qe4#
        • 2.Qxf3#
      • 1...Bxf4
        • 2.Bxf3#
        • 2.Qxf3#
      • 1...cxd4
        • 2.Qe4#
      • 1...Bxd3!
  • Keys
    • 1.Rxf3!
      • threat
        • 2.Rxd3#
      • 1...Rxf3+
        • 2.Bxf3#
      • 1...Ke4
        • 2.Rxd3#
      • 1...Rxd2
        • 2.Rf5#
      • 1...Rxd4
        • 2.Re3#
      • 1...cxd4
        • 2.Re3#
      • 1...Rc3
        • 2.Rfxc3#
      • 1...Be3
        • 2.Rf4#
      • 1...Re3
        • 2.Rxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,XQ(D)::B(C),XP(c)
  • Tries
    • Try
      • Q(D);XR(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(d);XS(F)::QAB1(D)
      • Refutation
        • B(f);XQ(D)
  • Actual
    • R(G);P_SPINR(G),XP(c)
    • Threat
      • B(C)+R(G),XR(b)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XR(G)::B(C),XR(b)
      • K(e);S_FLIGHT::B(C)+R(G),XR(b)
      • R(b);N_PINR(G),XQ(D)::B(C)+R(G),DCHECK
      • R(b);N_PINR(G),P_SPINR(b),XS(F)::B(C)+R(G)
      • P(d);SBLOCK,XS(F)::B(C)+R(G)
      • R(b);::B(C)+R(G),XR(b)
      • B(i);N_PINR(G)::B(C)+R(G)
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