MESON Chess Problem Database

Problem Display
PID: 201605 (rQ1R1b1q/p3P2n/6N1/PPk3nr/8/KPp5/3P4/5b2 w - - 0 1)

Markus, Gustav

Osterreichische Schachrundschau, 1922

rQ1R1b1q/p3P2n/6N1/PPk3nr/8/KPp5/3P4/5b2

#2

9 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qg8
      • 2.d4#
    • 1...Bc4
      • 2.b4#
    • 1...Bxb5
      • 2.Qd6#
    • 1...Sf6
      • 2.d4#
    • 1...a6
      • 2.Qb6#
  • Tries
    • 1.Qxa7+?
      • 1...Kxb5
        • 2.Qb6#
      • 1...Rxa7!
    • 1.Qc8+?
      • 1...Kxb5
        • 2.Rd5#
      • 1...Rxc8!
    • 1.exf8Q+?
      • 1...Qxf8
        • 2.Qe5#
        • 2.d4#
      • 1...Sxf8!
    • 1.exf8B+?
      • 1...Qxf8
        • 2.Qe5#
        • 2.d4#
      • 1...Sxf8!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rd5#
      • 1...Bxb5
        • 2.Qd6#
      • 1...Qd4
        • 2.Rc8#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qg8
        • 2.d4#
      • 1...Bg2
        • 2.Sd3#
      • 1...Bc4
        • 2.b4#
      • 1...Sf3
        • 2.Se6#
      • 1...Sh3
        • 2.Se6#
      • 1...Se4
        • 2.Se6#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sf7
        • 2.Se6#
      • 1...Sf6
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(j);N_GUARD::QAR2(H),XQ(j)
    • Q(j);N_GUARD::P(A)
    • B(a);SBLOCK::P(C)
    • B(a);SBLOCK,XP(E)::QAB1(H)
    • S(g);S_CUTQ(j)::P(A)
    • P(f);N_GUARD::QAB1(H)
  • Tries
    • Try
      • Q(H);CHECK,XP(f)
      • Vars
        • K(c);P-FLIGHT,P_PINP(G),XP(E)::QAR1(H)
      • Refutation
        • R(h);P_PINP(D),XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);P-FLIGHT,P_PINP(G),XP(E)::R(I)
      • Refutation
        • R(h);XQ(H)
    • Try
      • P(G);CHECK,XB(i)
      • Refutation
        • S(g);XQ(G)
    • Try
      • P(G);CHECK,XB(i)
      • Refutation
        • S(g);XB(G)
  • Actual
    • S(F);
    • Threat
      • R1(I)
    • Vars
      • B(a);SBLOCK,XP(E)::QAB1(H)
      • Q(j);SBLOCK::R(I)
      • Q(j);N_GUARD::QAR2(H),XQ(j)
      • Q(j);N_GUARD::P(A)
      • B(a);N_GUARD::S(F)
      • B(a);SBLOCK::P(C)
      • S(d);N_GUARD::S(F)
      • S(d);N_GUARD::S(F),XS(d)
      • S(g);S_CUTQ(j)::P(A)
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