MESON Chess Problem Database

Problem Display
PID: 164900 (Q2q4/8/b3B2B/1PPRPP2/3Nk1p1/3R1p2/2K2p2/5n2 w - - 0 1)

Simoni, Francesco

3rd HM., Best Problems, 2016

Q2q4/8/b3B2B/1PPRPP2/3Nk1p1/3R1p2/2K2p2/5n2

#2

11 + 7

4901 Best Problems 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Qxd5#
    • 1...Sd2
      • 2.Re3#
    • 1...Sh2
      • 2.Re3#
    • 1...Se3+
      • 2.Rxe3#
    • 1...Sg3
      • 2.Re3#
  • Tries
    • 1.Sb3?
      • threat
        • 2.R3d4#
      • 1...Se3+
        • 2.Rxe3#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Qg5!
    • 1.Sc6?
      • threat
        • 2.R3d4#
      • 1...Se3+
        • 2.Rxe3#
      • 1...Qg5
        • 2.R5d4#
      • 1...Qxd5!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.R5d4#
      • 1...Se3+
        • 2.Rxe3#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...gxf3
        • 2.R3d4#
      • 1...Bb7
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(g);OGATE,P_SPINQ(g),XR(F)::QAB1(K),XQ(g)
    • S(a);N_GUARD::R1(B)
    • S(a);CHECK,N_GUARD::R1(B),XS(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(B)
      • Vars
        • S(a);CHECK,N_GUARD::R1(B),XS(a)
        • Q(g);OGATE,P_SPINQ(g),XR(F)::QAB1(K),XQ(g)
      • Refutation
        • Q(g);
    • Try
      • S(C);
      • Threat
        • R1(B)
      • Vars
        • S(a);CHECK,N_GUARD::R1(B),XS(a)
        • Q(g);N_GUARD::R1(F)
      • Refutation
        • Q(g);XR(F)
  • Actual
    • S(C);XP(c)
    • Threat
      • QAB(K)+R(F),DCHECK
    • Vars
      • S(a);CHECK,N_GUARD::R1(B),XS(a)
      • Q(g);OGATE,P_SPINQ(g),XR(F)::QAB1(K),XQ(g)
      • P(e);SBLOCK,XS(C)::R1(B)
      • B(f);OGATE::QAR(K)
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