MESON Chess Problem Database

Problem Display
PID: 71461 (4Q1b1/1p5n/2R2p2/1Ppk3N/1R1B1b2/1P1pp3/NKP1Br2/1n4rq w - - 0 1)

Nascimento, Raul C

The Problemist, 1989

4Q1b1/1p5n/2R2p2/1Ppk3N/1R1B1b2/1P1pp3/NKP1Br2/1n4rq

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Sxf4#
    • 1...Rg2
      • 2.Sxf4#
      • 2.Bf3#
    • 1...Rh2
      • 2.Sxf4#
    • 1...Be6
      • 2.Qxe6#
    • 1...Sd2
      • 2.Sc3#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sg5
      • 2.Sxf6#
    • 1...Sf8
      • 2.Sxf6#
    • 1...bxc6
      • 2.Qxc6#
  • Tries
    • 1.Qd7+?
      • 1...Ke4
        • 2.cxd3#
      • 1...Bd6!
  • Keys
    • 1.Bxf6!
      • threat
        • 2.c4#
      • 1...Be5+
        • 2.Qxe5#
      • 1...Rxe2
        • 2.Sxf4#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...dxc2
        • 2.Bc4#
      • 1...cxb4
        • 2.Sxb4#
      • 1...bxc6
        • 2.Qxc6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Rc1
        • 2.Qxg8#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sd2
        • 2.Sc3#
      • 1...Sa3
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...c4
        • 2.bxc4#

This is a version of 71455

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD,P_PINP(C),XB(D)::S(I),XB(g)
    • R(d);N_GUARD::S(I),XB(g)
    • B(m);N_GUARD::QAB1(K),XB(m)
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
    • S(l);N_GUARD::S(I),XP(j)
    • P(k);OGATE,XR(J)::QAB1(K),XP(k)
  • Tries
    • Try
      • Q(K);CHECK
      • Vars
        • K(i);S_FLIGHT::P(C),XP(e)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • B(G);XP(j)
    • Threat
      • P(C)
    • Vars
      • B(g);CHECK,N_GUARD::QAR1(K),XB(g)
      • R(d);N_GUARD,P_PINP(C),XB(D)::S(I),XB(g)
      • S(l);XB(G)::S(I),XS(l)
      • P(e);OGATE,XP(C)::B(D)
      • P(h);XR(F)::S(A),XP(h)
      • P(k);OGATE,XR(J)::QAB1(K),XP(k)
      • Q(c);N_GUARD::QAB1(K),XQ(c)
      • R(b);N_GUARD::QAB(K),XB(m)
      • B(m);N_GUARD::QAB1(K),XB(m)
      • S(a);N_GUARD::S(A)
      • S(a);N_GUARD::S(A),XS(a)
      • P(h);OGATE::P(E),XP(h)
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