MESON Chess Problem Database

Problem Display
PID: 21291 (3q3r/4B3/5nR1/p3QBb1/r6k/4p1NP/8/3n2KR w - - 0 1)

Bottacchi, Antonio

1st Prize, Densmore MT (Pittsburgh Gazette-Times), 1918-1920

(First published on Sun Nov 17 1918)

3q3r/4B3/5nR1/p3QBb1/r6k/4p1NP/8/3n2KR

#2

8 + 9

3360 Simple Two-move Themes 1924
3174 The Two-move Chess Problem Tradition and Development 1966
133 The Problemist Supplement 2006
4901 Best Problems 2008
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.hxg4#
    • 1...Bf4
      • 2.Rg4#
    • 1...Se4
      • 2.Qf4#
    • 1...Sg4
      • 2.hxg4#
    • 1...Sh7
      • 2.Rh6#
  • Tries
    • 1.Be6?
      • threat
        • 2.Qxg5#
      • 1...Rg4
        • 2.hxg4#
      • 1...Rh5
        • 2.Sf5#
      • 1...Bf4
        • 2.Rg4#
      • 1...Bh6
        • 2.Qh5#
      • 1...Se4
        • 2.Qf4#
      • 1...Sg4
        • 2.hxg4#
      • 1...Sh7
        • 2.Rh6#
      • 1...Qd5!
    • 1.Bc8?
      • threat
        • 2.Qxg5#
      • 1...Rg4
        • 2.hxg4#
      • 1...Rh5
        • 2.Sf5#
      • 1...Bf4
        • 2.Rg4#
      • 1...Bh6
        • 2.Qh5#
      • 1...Se4
        • 2.Qf4#
      • 1...Sg4
        • 2.hxg4#
      • 1...Sh7
        • 2.Rh6#
      • 1...Qd5!
    • 1.Qf4+?
      • 1...Bxf4
        • 2.Rg4#
      • 1...Sg4
        • 2.hxg4#
      • 1...Rxf4!
  • Keys
    • 1.Bd7!
      • threat
        • 2.Qxg5#
      • 1...Rg4
        • 2.hxg4#
      • 1...Rh5
        • 2.Sf5#
      • 1...Bf4
        • 2.Rg4#
      • 1...Bh6
        • 2.Qh5#
      • 1...Se4
        • 2.Qf4#
      • 1...Sg4
        • 2.hxg4#
      • 1...Sh7
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,P_PINS(C)::R(B)+P(D),XR(c)
    • B(f);OGATE,P_SPINS(g)::R1(G)
    • S(g);N_GUARD,P_SPINB(f),S_CUTR(c)::QAR2(E)
    • S(g);OGATE,P_SPINB(f)::R(B)+P(D),XS(g)
    • S(g);N_GUARD,P_SPINB(f),S_CUTR(i)::R(G)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAB1(E),XB(f)
      • Vars
        • R(c);OGATE,P_PINS(C)::R(B)+P(D),XR(c)
        • R(i);SBLOCK::S(C)
        • B(f);OGATE,P_SPINS(g)::R1(G)
        • B(f);OGATE,P_SPINS(g)::QAR1(E)
        • S(g);N_GUARD,P_SPINB(f),S_CUTR(c)::QAR2(E)
        • S(g);OGATE,P_SPINB(f)::R(B)+P(D),XS(g)
        • S(g);N_GUARD,P_SPINB(f),S_CUTR(i)::R(G)
      • Refutation
        • Q(h);
    • Try
      • B(F);
      • Threat
        • QAB1(E),XB(f)
      • Vars
        • R(c);OGATE,P_PINS(C)::R(B)+P(D),XR(c)
        • R(i);SBLOCK::S(C)
        • B(f);OGATE,P_SPINS(g)::R1(G)
        • B(f);OGATE,P_SPINS(g)::QAR1(E)
        • S(g);N_GUARD,P_SPINB(f),S_CUTR(c)::QAR2(E)
        • S(g);OGATE,P_SPINB(f)::R(B)+P(D),XS(g)
        • S(g);N_GUARD,P_SPINB(f),S_CUTR(i)::R(G)
      • Refutation
        • Q(h);
    • Try
      • Q(E);CHECK
      • Vars
        • B(f);OGATE,P_SPINS(g),XQ(E)::R1(G)
        • S(g);OGATE,P_SPINB(f),P_SPINS(g)::R(B)+P(D),XS(g)
      • Refutation
        • R(c);XQ(E)
  • Actual
    • B(F);
    • Threat
      • QAB1(E),XB(f)
    • Vars
      • R(c);OGATE,P_PINS(C)::R(B)+P(D),XR(c)
      • R(i);SBLOCK::S(C)
      • B(f);OGATE,P_SPINS(g)::R1(G)
      • B(f);OGATE,P_SPINS(g)::QAR1(E)
      • S(g);N_GUARD,P_SPINB(f),S_CUTR(c)::QAR2(E)
      • S(g);OGATE,P_SPINB(f)::R(B)+P(D),XS(g)
      • S(g);N_GUARD,P_SPINB(f),S_CUTR(i)::R(G)
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