MESON Chess Problem Database

Problem Display
PID: 219070 (Q1b2N2/1nP3P1/7R/4kp2/2K5/2p2pP1/n4PN1/1B6 w - - 0 1)

Liberali, Giuseppe

Baltimore American and Commercial Advertiser, 1882

Q1b2N2/1nP3P1/7R/4kp2/2K5/2p2pP1/n4PN1/1B6

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be6+
      • 2.Rxe6#
    • 1...Bd7
      • 2.Sxd7#
    • 1...Sa5+
      • 2.Qxa5#
    • 1...Sc5
      • 2.Qd5#
    • 1...Sd8
      • 2.Qd5#
      • 2.Qa5#
    • 1...fxg2
      • 2.f4#
    • 1...f4
      • 2.gxf4#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.Qd5#
        • 2.Qb5#
      • 1...Be6+
        • 2.Rxe6#
      • 1...Bxb7
        • 2.Sd7#
        • 2.Re6#
      • 1...Bd7
        • 2.Sxd7#
        • 2.Qd5#
      • 1...c2
        • 2.Qd5#
      • 1...Sb4!
    • 1.Qa5+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sxa5+!
    • 1.Qa6?
      • threat
        • 2.Sg6#
        • 2.Qf6#
      • 1...Be6+
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Sa5+
        • 2.Qxa5#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...c2!
    • 1.Qa7?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Be6+
        • 2.Rxe6#
      • 1...Sa5+
        • 2.Qxa5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...f4
        • 2.Qd4#
        • 2.gxf4#
      • 1...Sd6+!
    • 1.g8Q?
      • threat
        • 2.Qd5#
        • 2.Qg7#
        • 2.Qh8#
      • 1...Be6+
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Sa5+
        • 2.Qxa5#
      • 1...c2
        • 2.Qd5#
      • 1...Sb4
        • 2.Qg7#
        • 2.Qh8#
      • 1...Sd6+!
  • Keys
    • 1.Qa3!
      • 1...Be6+
        • 2.Rxe6#
      • 1...Sa5+
        • 2.Qxa5#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...fxg2
        • 2.f4#
      • 1...c2
        • 2.Qe3#
      • 1...Sc1
        • 2.Qxc3#
      • 1...Bd7
        • 2.Sxd7#
      • 1...Sb4
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd8
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qa5#
      • 1...f4
        • 2.gxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(g);CHECK,N_GUARD::R1(F),XB(g)
    • B(g);N_GUARD::S(J),XB(g)
    • S(f);CHECK,N_GUARD::QAR(I),XS(f)
    • S(f);OGATE::QAR1(I)
    • P(c);OGATE,XS(C)::P(B)
    • P(e);OGATE::P(D),XP(e)
  • Tries
    • Try
      • Q(I);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);CHECK,N_GUARD::R1(F),XB(g)
        • P(b);::QAR1(I)
      • Refutation
        • S(a);
    • Try
      • Q(I);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR2(I),XS(f)
      • Refutation
        • S(f);CHECK,XQ(I)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);CHECK,N_GUARD::QAR(I),XS(f)
        • S(f);CHECK,N_GUARD::QAB1(I),XS(f)
      • Refutation
        • P(b);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);CHECK,N_GUARD::R1(F),XB(g)
        • S(f);CHECK,N_GUARD::QAR(I),XS(f)
        • S(f);N_GUARD::QAR2(I),XS(f)
      • Refutation
        • S(f);CHECK
    • Try
      • P(H);
      • Threat
        • DUALS(3)
      • Vars
        • S(f);CHECK,N_GUARD::QAR(I),XS(f)
        • P(b);::QAR1(H)
      • Refutation
        • S(f);CHECK
  • Actual
    • Q(I);
    • Vars
      • B(g);CHECK,N_GUARD::R1(F),XB(g)
      • S(f);CHECK,N_GUARD::QAR(I),XS(f)
      • S(f);CHECK,N_GUARD::QAB1(I),XS(f)
      • P(c);OGATE,XS(C)::P(B)
      • P(b);OGATE::QAR2(I)
      • S(a);N_GUARD::QAB(I),XP(b)
      • B(g);N_GUARD::S(J),XB(g)
      • S(f);N_GUARD::QAR2(I),XS(f)
      • P(e);OGATE::P(D),XP(e)
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