MESON Chess Problem Database

Problem Display
PID: 168244 (K1NR1R2/p7/4k3/r2rnp2/4Qbp1/2B5/6N1/1bq5 w - - 0 1)

Petite, Efren

Il Due Mosse, 1958

K1NR1R2/p7/4k3/r2rnp2/4Qbp1/2B5/6N1/1bq5

#2

7 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sxf4#
    • 1...Qa3
      • 2.Sxf4#
    • 1...Qd1
      • 2.Sxf4#
    • 1...Qe1
      • 2.Sxf4#
    • 1...Qg1
      • 2.Sxf4#
    • 1...Qh1
      • 2.Sxf4#
    • 1...Qc2
      • 2.Sxf4#
    • 1...Qxc3
      • 2.Sxf4#
    • 1...Ra1
      • 2.Qxd5#
    • 1...Ra2
      • 2.Qxd5#
    • 1...Ra3
      • 2.Qxd5#
    • 1...Ra4
      • 2.Qxd5#
    • 1...Ra6
      • 2.Qxd5#
    • 1...Rd2
      • 2.Sxf4#
    • 1...Rd3
      • 2.Qxf5#
    • 1...Rb5
      • 2.Rd6#
    • 1...Rc5
      • 2.Rd6#
    • 1...Rd6
      • 2.Rxd6#
    • 1...Ba2
      • 2.Qxf5#
  • Tries
    • 1.Qxe5+?
      • 1...Rxe5
        • 2.Rd6#
      • 1...Bxe5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Rd6#
      • 1...Sxc4
        • 2.Rf6#
      • 1...Qa3
        • 2.Sxf4#
      • 1...Ra6
        • 2.Qxd5#
      • 1...Sd3
        • 2.Rf6#
      • 1...Sf3
        • 2.Rf6#
      • 1...Sc6
        • 2.Rf6#
      • 1...Sg6
        • 2.Rf6#
      • 1...Sd7
        • 2.Rde8#
      • 1...Sf7
        • 2.Rfe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 17
  • Sets
    • Q(b);N_GUARD::S(A),XB(c)
    • Q(b);N_GUARD,XB(B)::S(A),XB(c)
    • R(e);N_GUARD::QAB1(C),XR(f)
    • R(f);S_CUTQ(b)::S(A),XB(c)
    • R(f);S_CUTB(a)::QAB1(C),XP(h)
    • R(f);N_GUARD::R1(F)
    • R(f);N_GUARD::R1(F),XR(f)
    • B(a);N_GUARD::QAB1(C),XP(h)
  • Tries
    • Try
      • Q(C);CHECK,XS(g)
      • Vars
        • R(f);XQ(C)::R1(F)
      • Refutation
        • B(c);XQ(C)
  • Actual
    • Q(C);N_PINS(g),P_PINR(f)
    • Threat
      • R1(F)
    • Vars
      • S(g);N_SPINR(f),XQ(C)::R1(G)
      • Q(b);N_GUARD::S(A),XB(c)
      • R(e);N_GUARD::QAB1(C),XR(f)
      • S(g);::R1(G)
      • S(g);SBLOCK::R(F)
      • S(g);SBLOCK::R(G)
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