MESON Chess Problem Database
Problem Display
PID: 149910 (5B2/1P1pn3/2b1PN1b/K1P1k3/2Q2RB1/2nr1pP1/5p2/4Nq2 w - - 0 1)
Busack, Otto
Die Schwalbe, 1940
#2
11 + 10
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Sxd3#
- 1...Qh3
- 2.Sxd3#
- 1...Qg1
- 2.Sxd3#
- 1...Qh1
- 2.Sxd3#
- 1...Re3
- 2.Qd4#
- 1...Rd4
- 2.Qxd4#
- 1...Rd5
- 2.Sxf3#
- 1...Bd5
- 2.Sxd7#
- 1...Bxf4
- 2.Qxf4#
- 1...Se2
- 2.Sxd3#
- 1...Scd5
- 2.Qe4#
- 1...Sed5
- 2.Bd6#
- 1...Sf5
- 2.Rxf5#
- 1...Sg6
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Sg8
- 2.Rf5#
- 1...dxe6
- 2.Qxe6#
- 1...d5
- 2.b8Q#
- 2.b8B#
- 1...Qg2
- Tries
- 1.Sxf3+?
- 1...Rxf3
- 2.Qd4#
- 1...Bxf3!
- 1...Rxf3
- 1.Bxe7?
- threat
- 2.Rf5#
- 1...Bxf4
- 2.Qxf4#
- 2.gxf4#
- 1...dxe6
- 2.Qxe6#
- 1...Rd5
- 2.Sxf3#
- 1...Bd5
- 2.Sxd7#
- 2.Bd6#
- 1...Sd5
- 2.Bd6#
- 2.Re4#
- 2.Qe4#
- 1...d5
- 2.Bd6#
- 2.b8Q#
- 2.b8B#
- 1...Be4!
- threat
- 1.Bg7?
- threat
- 2.Sxd7#
- 1...dxe6
- 2.Sd7#
- 2.Qxe6#
- 1...d5
- 2.Sd7#
- 2.b8Q#
- 2.b8B#
- 1...d6
- 2.Sd7#
- 1...Bxg7!
- threat
- 1.Qxd3?
- threat
- 2.Qxc3#
- 2.Qd4#
- 2.Qd6#
- 1...Qxd3
- 2.Sxd3#
- 1...Qxe1
- 2.Qd4#
- 2.Qd6#
- 1...Bxf4
- 2.Qxc3#
- 1...fxe1Q
- 2.Qd4#
- 2.Qd6#
- 1...fxe1B
- 2.Qd4#
- 2.Qd6#
- 1...Sf5
- 2.Qxf5#
- 1...Be4
- 2.Sxd7#
- 2.Qxc3#
- 2.Qd6#
- 1...Bd5
- 2.Sxd7#
- 2.Qxc3#
- 2.Qd4#
- 1...Sb1
- 2.Qd4#
- 2.Qd6#
- 1...Sd1
- 2.Qd4#
- 2.Qd6#
- 1...Sa2
- 2.Qd4#
- 2.Qd6#
- 1...Se2
- 2.Qd6#
- 1...Sa4
- 2.Qd4#
- 2.Qd6#
- 1...Se4
- 2.Sxf3#
- 1...Scd5
- 2.Sxf3#
- 2.Qe4#
- 2.Qd4#
- 1...Sed5
- 2.Sxf3#
- 2.Bd6#
- 2.Qf5#
- 2.Qd4#
- 1...Sc8
- 2.Qf5#
- 2.Qxc3#
- 2.Qd4#
- 1...d5
- 2.Sxf3#
- 2.Qd4#
- 2.b8Q#
- 2.b8B#
- 1...d6
- 2.Qxc3#
- 2.Qd4#
- 2.Qxd6#
- 1...Sb5!
- threat
- 1.Qd5+?
- 1...Rxd5
- 2.Sxf3#
- 1...Bxd5
- 2.Sxd7#
- 1...Sexd5
- 2.Bd6#
- 1...Scxd5!
- 1...Rxd5
- 1.Qxc3+?
- 1...Rd4
- 2.Qxd4#
- 1...Rxc3!
- 1...Rd4
- 1.b8Q+?
- 1...Rd6
- 2.Qxd6#
- 2.Qxc3#
- 2.Qd4#
- 1...d6!
- 1...Rd6
- 1.b8B+?
- 1...Rd6
- 2.Bxd6#
- 2.Qxc3#
- 2.Qd4#
- 1...d6!
- 1...Rd6
- 1.Sxf3+?
- Keys
- 1.Bh3!
- threat
- 2.Sg4#
- 1...Qxh3
- 2.Sxd3#
- 1...Bxf4
- 2.Qxf4#
- 1...Rd5
- 2.Sxf3#
- 1...Bd5
- 2.Sxd7#
- 1...Scd5
- 2.Qe4#
- 1...Sed5
- 2.Bd6#
- 1...d5
- 2.b8Q#
- 2.b8B#
- threat
- 1.Bh3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 11
- Sets
- Q(a);N_GUARD::S(A),XR(d)
- R(d);N_GUARD::QAB1(C)
- R(d);N_GUARD::QAB1(C),XR(d)
- R(d);N_GUARD,P_PINP(G),S_CUTB(g)::S(A),XP(e)
- B(g);N_GUARD,S_CUTR(d)::S(I),XP(i)
- B(h);OGATE,XR(D)::QAB1(C),XB(h)
- S(c);S_CUTQ(a)::S(A),XR(d)
- S(c);N_GUARD,S_CUTB(g)::QAR1(C)
- S(j);OGATE::B(K)
- S(j);N_GUARD::R1(D),XS(j)
- S(j);N_GUARD::R1(D)
- P(i);OGATE,XP(H)::QAR1(C),XP(i)
- P(i);N_GUARD,S_CUTR(d)::P=Q
- Tries
- Try
- S(A);CHECK,XP(e)
- Vars
- R(d);XS(A)::QAB1(C)
- Refutation
- B(g);XS(A)
- Try
- B(K);XS(j)
- Threat
- R1(D)
- Vars
- P(i);OGATE,XP(H)::QAR1(C),XP(i)
- R(d);N_GUARD,P_PINP(G),S_CUTB(g)::S(A),XP(e)
- Refutation
- B(g);
- Try
- B(K);
- Threat
- B(K)+S(I),DCHECK,XP(i)
- Vars
- P(i);::B(K)+S(I),DCHECK
- Refutation
- B(h);XB(K)
- Try
- Q(C);XR(d)
- Threat
- DUALS(3)
- Vars
- Q(a);XQ(C)::S(A),XQ(a)
- B(h);XR(D)::QAB(C),XS(c)
- S(j);N_GUARD::QAR1(C),XS(j)
- S(c);::QAB1(C)
- S(c);S_CUTB(g)::S(A),XP(e)
- Refutation
- S(c);
- Try
- Q(C);CHECK
- Vars
- R(d);P_PINP(G),XQ(C)::S(A),XP(e)
- B(g);SBLOCK,XQ(C)::S(I),XP(i)
- S(j);OGATE,XQ(C)::B(K)
- Refutation
- S(c);XQ(C)
- Try
- Q(C);CHECK,XS(c)
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAB1(C),XR(d)
- Refutation
- R(d);XQ(C)
- Try
- P(J);CHECK
- Refutation
- P(i);P_SPINP(i)
- Try
- P(J);CHECK
- Refutation
- P(i);P_SPINP(i)
- Try
- Actual
- B(E);
- Threat
- S(I)
- Vars
- Q(a);N_GUARD,XB(E)::S(A),XR(d)
- B(h);OGATE,XR(D)::QAB1(C),XB(h)
- R(d);N_GUARD,P_PINP(G),S_CUTB(g)::S(A),XP(e)
- B(g);N_GUARD,S_CUTR(d)::S(I),XP(i)
- S(c);N_GUARD,S_CUTB(g)::QAR1(C)
- S(j);OGATE::B(K)
- P(i);N_GUARD,S_CUTR(d)::P=Q
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).