MESON Chess Problem Database

Problem Display
PID: 101340 (RK3k2/pp2q3/4P1Qp/4pr2/1B4n1/8/5brp/8 w - - 0 1)

Guidelli, Giorgio

Good Companions (December), 1918

RK3k2/pp2q3/4P1Qp/4pr2/1B4n1/8/5brp/8

#2

5 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Bxd6#
    • 1...Rg5
      • 2.Qf7#
    • 1...Rh5
      • 2.Qf7#
    • 1...Rf7
      • 2.Qxf7#
    • 1...Be1
      • 2.Kxa7#
    • 1...Bg3
      • 2.Kxa7#
    • 1...Bh4
      • 2.Kxa7#
    • 1...Se3
      • 2.Kxa7#
    • 1...Sf6
      • 2.Qf7#
  • Tries
    • 1.Qg7+?
      • 1...Ke8
        • 2.Qxe7#
      • 1...Kxg7!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qh8#
      • 1...Qd6+
        • 2.Kxb7#
      • 1...Ke8
        • 2.Qxe7#
      • 1...Qxb4
        • 2.Kc7#
      • 1...Qc5
        • 2.Kxb7#
      • 1...Rg5
        • 2.Qf7#
      • 1...Se3
        • 2.Kxa7#
      • 1...Sf6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(j);CHECK,OGATEB::B(A),XQ(j)
    • R(f);N_GUARD::QAR1(C)
    • R(f);N_GUARD::QAR1(C),XR(f)
    • B(a);::R(D)+K(E),XP(h)
    • S(d);::R(D)+K(E),XP(h)
    • S(d);S_CUTR(f)::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(k);N_SPINQ(j),P-FLIGHT::QAR1(C),XQ(j)
      • Refutation
        • K(k);N_SPINQ(j),S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • Q(j);CHECK::R(D)+K(E),XP(i)
      • K(k);N_SPINQ(j),P-FLIGHT::QAR1(C),XQ(j)
      • Q(j);N_SPINQ(j),XB(A)::R(D)+K(E)
      • Q(j);::R(D)+K(E),XP(i)
      • R(f);N_GUARD::QAR1(C)
      • S(d);::R(D)+K(E),XP(h)
      • S(d);S_CUTR(f)::QAR1(C)
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