MESON Chess Problem Database

Problem Display
PID: 109926 (5q2/8/3B4/4P3/1Np1knQb/2PRNp2/1KP5/1n2rr1B w - - 0 1)

Dalla Rosa, Pedro

Faria, Oswaldo

Agarez MT, 1960

5q2/8/3B4/4P3/1Np1knQb/2PRNp2/1KP5/1n2rr1B

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Qf5#
    • 1...Qh6
      • 2.Qf5#
    • 1...Qe7
      • 2.Qf5#
    • 1...Qg7
      • 2.Qf5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qa8
      • 2.Qf5#
    • 1...Qb8
      • 2.Qf5#
    • 1...Qd8
      • 2.Qf5#
    • 1...Qe8
      • 2.Qf5#
    • 1...Qg8
      • 2.Qf5#
    • 1...Qh8
      • 2.Qf5#
    • 1...Rxe3
      • 2.Rd4#
    • 1...Rg1
      • 2.Bxf3#
      • 2.Qxf3#
    • 1...Bf2
      • 2.Bxf3#
      • 2.Qxf3#
    • 1...Bf6
      • 2.Qf5#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Rd4#
      • 1...Sxc3
        • 2.Sd2#
      • 1...Rd1
        • 2.Re3#
      • 1...Bf2
        • 2.Bxf3#
      • 1...Qxd6!
    • 1.Qg6+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sxg6!
  • Keys
    • 1.Sed5!
      • threat
        • 2.Rd4#
      • 1...Qxd6
        • 2.Qxf4#
      • 1...Sxc3
        • 2.Sxc3#
      • 1...cxd3
        • 2.cxd3#
      • 1...Rd1
        • 2.Re3#
      • 1...Bf2
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(i);N_GUARD,XB(J)::QAB1(H)
    • Q(i);N_GUARD::QAB1(H)
    • Q(i);N_GUARD::QAB1(H),XQ(i)
    • Q(i);N_GUARD,P_PINS(G)::QAB1(H)
    • R(b);SBLOCK,XS(F)::R1(E)
    • B(h);S_CUTQ(i)::QAB1(H)
  • Tries
    • Try
      • S(F);XP(e)
      • Threat
        • R1(E)
      • Vars
        • S(a);N_GUARD,XP(D)::S(F)
        • R(b);N_GUARD::R1(E)
        • B(h);S_CUTR(c)::B(A),XP(d)
      • Refutation
        • Q(i);XB(J)
    • Try
      • Q(H);CHECK,N_PINS(g)
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(H),XQ(i)
      • Refutation
        • S(g);XQ(H)
  • Actual
    • S(F);
    • Threat
      • R1(E)
    • Vars
      • Q(i);N_GUARD,XB(J)::QAR1(H),XS(g)
      • S(a);XP(D)::S(F),XS(a)
      • P(e);OGATE,XR(E)::P(C),XP(e)
      • R(b);N_GUARD::R1(E)
      • B(h);S_CUTR(c)::B(A),XP(d)
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