MESON Chess Problem Database

Problem Display
PID: 30135 (8/2p5/8/3P4/7p/p4Pkr/R1n3Nr/1K3RQn w - - 0 1)

Valle, Giovanni Batista

Problemi di Scacchi, 1878

8/2p5/8/3P4/7p/p4Pkr/R1n3Nr/1K3RQn

#2

7 + 8

16 Chess Amateur (The) 1910
3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qxf2#
  • Tries
    • 1.Sf4+?
      • 1...Rg2
        • 2.Se2#
        • 2.Sh5#
      • 1...Kxf4!
    • 1.Qe3?
      • threat
        • 2.Qg5#
      • 1...Kxg2
        • 2.Rg1#
        • 2.Qg1#
      • 1...Rxg2
        • 2.Qe5#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Sxe3!
    • 1.Qd4?
      • threat
        • 2.Qg7#
        • 2.Qg4#
      • 1...Kxg2
        • 2.Qg1#
      • 1...Rxg2
        • 2.Qe5#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Se3
        • 2.Qe5#
        • 2.Qf4#
      • 1...Sxd4!
    • 1.Qc5?
      • 1...Kxg2
        • 2.Qg1#
      • 1...Rxg2
        • 2.Qxc7#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Sa1
        • 2.Qxc7#
      • 1...Se1
        • 2.Qxc7#
      • 1...Se3
        • 2.Qxc7#
      • 1...Sb4
        • 2.Qxc7#
      • 1...Sd4
        • 2.Qxc7#
      • 1...c6!
  • Keys
    • 1.Qa7!
      • 1...Kxg2
        • 2.Qg1#
      • 1...Rxg2
        • 2.Qxc7#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Sa1
        • 2.Qxc7#
      • 1...Se1
        • 2.Qxc7#
      • 1...Se3
        • 2.Qxc7#
      • 1...Sb4
        • 2.Qxc7#
      • 1...Sd4
        • 2.Qxc7#
      • 1...c5
        • 2.Qg7#
      • 1...c6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(e);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • R(c);SBLOCK,XS(E)::QAB(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);OGATEB,P-FLIGHT,P_SPINS(b),XS(E)::QAR1(C)
        • R(c);SBLOCK,XS(E)::QAB(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(e);OGATEB,P-FLIGHT,P_SPINS(b),XS(E)::QAR1(C)
        • R(c);SBLOCK,XS(E)::QAB(C),XP(h)
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(b);::QAB(C),XP(h)
      • Refutation
        • P(h);
  • Actual
    • Q(C);
    • Vars
      • K(e);OGATEB,P-FLIGHT,P_SPINS(b),XS(E)::QAR1(C)
      • R(c);SBLOCK,XS(E)::QAB(C),XP(h)
      • S(a);N_GUARD::QAB1(C),XS(a)
      • S(b);::QAB(C),XP(h)
      • P(h);OGATE::QAR(C)
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