MESON Chess Problem Database

Problem Display
PID: 143420 (7K/2p5/2B2R2/1p2kp1N/1N1n1R2/7Q/bp2pr2/1qB2n2 w - - 0 1)

Guidelli, Giorgio

Good Companions (July), 1917

7K/2p5/2B2R2/1p2kp1N/1N1n1R2/7Q/bp2pr2/1qB2n2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Sxd3#
    • 1...Qa1
      • 2.Sd3#
    • 1...Qxc1
      • 2.Sd3#
    • 1...Rxf4
      • 2.Bxf4#
    • 1...Sc2
      • 2.Sd3#
      • 2.Qxf5#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qxd4#
      • 1...Rxf4
        • 2.Bxf4#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Qe4!
    • 1.Qe3+?
      • 1...Qe4
        • 2.Sd3#
      • 1...Sxe3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxd4#
      • 1...Qxd3
        • 2.Sxd3#
      • 1...Rxf4
        • 2.Bxf4#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...Sc2
        • 2.Qxf5#
      • 1...Sb3
        • 2.Qd5#
      • 1...Sf3
        • 2.R4xf5#
      • 1...Se6
        • 2.R6xf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::S(C),XQ(a)
    • Q(a);N_GUARD::S(C)
    • Q(a);N_GUARD,XB(A)::S(C)
    • R(f);OGATE,XR(D)::B(A),XR(f)
  • Tries
    • Try
      • Q(B);P_PINS(g)
      • Threat
        • QAB1(B),XS(g)
      • Vars
        • R(f);OGATE,XR(D)::B(A),XR(f)
        • Q(a);N_GUARD::S(C),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • Q(B);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(C)
      • Refutation
        • S(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XS(g)
    • Vars
      • Q(a);XQ(B)::S(C),XQ(a)
      • R(f);OGATE,XR(D)::B(A),XR(f)
      • S(g);XB(F)::S(C),XS(g)
      • S(g);N_GUARD,S_CUTQ(a)::QAR1(B),XP(j)
      • S(g);OGATE::QAR1(B)
      • S(g);N_GUARD,S_CUTR(f)::R1(D),XP(j)
      • S(g);N_GUARD,SBLOCK::R1(G),XP(j)
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