MESON Chess Problem Database

Problem Display
PID: 223038 (3n1r2/1pQRbr2/5p2/3P1Pp1/1Ppk4/6N1/3P4/1K6 w - - 0 1)

Valle, Giovanni Batista

100 Problemi di Scacchi, 1878

3n1r2/1pQRbr2/5p2/3P1Pp1/1Ppk4/6N1/3P4/1K6

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qxc3#
  • Tries
    • 1.Qf4+?
      • 1...Kd3
        • 2.Qe3#
      • 1...gxf4!
    • 1.Qb6+?
      • 1...Kd3
        • 2.Qe3#
      • 1...Ke5
        • 2.Qe3#
      • 1...Bc5!
    • 1.Qxc4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kxc4!
    • 1.Qc5+?
      • 1...Kd3
        • 2.Qe3#
      • 1...Ke5
        • 2.Qe3#
      • 1...Bxc5!
  • Keys
    • 1.d6!
      • threat
        • 2.dxe7#
      • 1...Kd3
        • 2.dxe7#
      • 1...Kd5
        • 2.Qc5#
        • 2.dxe7#
      • 1...Ke5
        • 2.dxe7#
      • 1...Bxd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE::QAB1(G),XP(a)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(G)
      • Refutation
        • P(c);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(G)
        • K(b);OGATE,S_FLIGHT::QAR2(G)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • Q(G);CHECK,XP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • K(b);P-FLIGHT,XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(G)
        • K(b);OGATE,S_FLIGHT::QAR2(G)
      • Refutation
        • B(f);XQ(G)
  • Actual
    • P(E);
    • Threat
      • R(H)+P(E),XB(f)
    • Vars
      • K(b);P-FLIGHT::R(H)+P(E),XB(f)
      • K(b);S_FLIGHT::QAB(G)+P(E),XB(f)
      • B(f);OGATE,P_SPINB(f),XP(E)::QAR2(G),XB(f)
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