MESON Chess Problem Database

Problem Display
PID: 228171 (3N4/5p1b/K2P2B1/3RP3/1Nk5/2P5/P3Rbq1/n1nQB3 w - - 0 1)

Guida, Marco

The Problemist, 2020

3N4/5p1b/K2P2B1/3RP3/1Nk5/2P5/P3Rbq1/n1nQB3

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Qxd5#
    • 1...Bxe1
      • 2.Qd4#
    • 1...Bg3
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bh4
      • 2.Qd4#
    • 1...Sxe2
      • 2.Qxe2#
      • 2.Qd3#
    • 1...Sb3
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
  • Tries
    • 1.Re4+?
      • 1...Bd4
        • 2.Rexd4#
        • 2.Qxd4#
      • 1...Qxe4!
    • 1.Rd4+?
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Kc5!
    • 1.Qa4?
      • threat
        • 2.Qb5#
      • 1...Qxd5
        • 2.Sd3#
      • 1...Bxe1
        • 2.Qc6#
      • 1...Sxa2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb2#
      • 1...Kxd5
        • 2.Bxf7#
      • 1...Qxd5
        • 2.Qa4#
      • 1...Bxe1
        • 2.Rc5#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Bd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(d);OGATE,XR(G)::QAB1(A),XQ(d)
    • B(c);N_GUARD,XB(B)::QAR1(A)
    • B(c);N_GUARD::QAR1(A)
    • B(c);N_GUARD::QAR1(A),XB(c)
    • S(b);N_GUARD::QAB1(A)
    • S(b);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • Q(d);XR(D)
    • Try
      • R(G);CHECK
      • Vars
        • B(c);OGATE,XR(G)::QAR1(A),XB(c)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(d);SBLOCK,XR(G)::QAR(A)+S(F)
        • B(c);N_GUARD,XB(B)::QAR2(A)
      • Refutation
        • S(b);XP(C)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(G)::B(K),XP(f)
      • Q(d);SBLOCK,XR(G)::QAR2(A)
      • B(c);N_GUARD,XB(B)::R1(G)
      • S(b);OGATE,XS(F)::QAB1(A),XS(b)
      • B(c);N_GUARD::R1(G),XB(c)
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