MESON Chess Problem Database

Problem Display
PID: 194886 (8/5K2/3N4/2p1k3/2PR4/5p2/4BPb1/Q7 w - - 0 1)

de Barbieri, Vittorio

L'Italia Scacchistica, 1918

8/5K2/3N4/2p1k3/2PR4/5p2/4BPb1/Q7

#2

7 + 4

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...fxe2
      • 2.f4#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qe3#
      • 1...fxe2
        • 2.f4#
      • 1...cxd4!
    • 1.Qc1?
      • threat
        • 2.Rd5#
        • 2.Qe3#
        • 2.Qf4#
      • 1...Kxd4
        • 2.Qb2#
        • 2.Qe3#
        • 2.Qa1#
      • 1...fxe2
        • 2.Qf4#
      • 1...cxd4!
    • 1.Qd1?
      • threat
        • 2.Re4#
      • 1...fxe2
        • 2.f4#
      • 1...cxd4!
    • 1.Qa5?
      • threat
        • 2.Qxc5#
      • 1...Kxd4
        • 2.Qa1#
      • 1...fxe2!
    • 1.Qa8?
      • threat
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qh8#
      • 1...Kxd4
        • 2.Qa1#
        • 2.Qh8#
      • 1...fxe2
        • 2.Qh8#
      • 1...cxd4!
  • Keys
    • 1.Qg1!
      • 1...Kxd4
        • 2.Qa1#
      • 1...fxe2
        • 2.f4#
      • 1...cxd4
        • 2.Qh2#
      • 1...Bf1
        • 2.Qg7#
      • 1...Bh1
        • 2.Qg7#
      • 1...Bh3
        • 2.Qg7#

This anticipates 103742(1991)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE,XB(B)::P(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(b);OGATE,XB(B)::P(C)
      • Refutation
        • P(c);P_SPINP(c),XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);XB(B)::QAB1(A)
      • Refutation
        • P(c);XR(E)
    • Try
      • Q(A);
      • Threat
        • R1(E)
      • Vars
        • P(b);OGATE,XB(B)::P(C)
      • Refutation
        • P(c);XR(E)
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAR2(A),XP(c)
      • Vars
        • K(d);N_SPINP(c),OGATEB,S_FLIGHT,XR(E)::QAB(A)
      • Refutation
        • P(b);XB(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);XB(B)::QAB(A)
      • Refutation
        • P(c);XR(E)
  • Actual
    • Q(A);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(E)::QAB(A)
      • P(b);OGATE,XB(B)::P(C)
      • P(c);SBLOCK,XR(E)::QAB(A)
      • B(a);OGATE::QAB(A)
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