MESON Chess Problem Database
Problem Display
PID: 82059 (1B2R3/3n4/2Q5/1p1P2b1/1q1kB3/1PR1N2p/3K1P1N/3b4 w - - 0 1)
Ahues, Herbert Siegfried Oskar
Die Schwalbe, 1955
#2
11 + 7
| 6490 | yacpdb | 2009 |
| 15148 | Sadier Collection | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Rd3#
- 1...Qxc3+
- 2.Qxc3#
- 1...Qc5
- 2.Rd3#
- 1...Qd6
- 2.Rd3#
- 1...Qf8
- 2.Rd3#
- 1...Qa4
- 2.Rd3#
- 1...Bc2
- 2.Sf3#
- 1...Bxb3
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Bxe3+
- 2.fxe3#
- 1...Bh4
- 2.Sf5#
- 1...Bf6
- 2.Sf5#
- 1...Bd8
- 2.Sf5#
- 1...Qa3
- Tries
- 1.Bb1?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Be7
- 2.Sf5#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...Qe7!
- threat
- 1.Bc2?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Bxc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Be7
- 2.Sf5#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...Qe7!
- threat
- 1.Bg2?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Qe7
- 2.Rd3#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Be7
- 2.Sf5#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...hxg2!
- threat
- 1.Bd3?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Bf3
- 2.Sxf3#
- 1...Be7
- 2.Sf5#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...Qe7!
- threat
- 1.Bf3?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Bxf3
- 2.Sxf3#
- 1...Qe7
- 2.Rd3#
- 1...Be7
- 2.Sf5#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...Bc2!
- threat
- 1.Bf5?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Qe7
- 2.Rd3#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...Be7!
- threat
- 1.Bg6?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Qe7
- 2.Rd3#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...Be7!
- threat
- 1.Bh7?
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Qe7
- 2.Rd3#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- 1...Be7!
- threat
- 1.Be5+?
- 1...Kxe4
- 2.Qg6#
- 2.d6#
- 1...Sxe5!
- 1...Kxe4
- 1.Qc5+?
- 1...Qxc5
- 2.Rd3#
- 1...Sxc5!
- 1...Qxc5
- 1.Qf6+?
- 1...Bxf6
- 2.Sf5#
- 1...Se5
- 2.Qxe5#
- 1...Sxf6!
- 1...Bxf6
- 1.Bb1?
- Keys
- 1.Bh1!
- threat
- 2.Re4#
- 1...Qxc3+
- 2.Qxc3#
- 1...Bxe3+
- 2.fxe3#
- 1...Qe7
- 2.Rd3#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Be7
- 2.Sf5#
- 1...Sc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf6
- 2.Be5#
- threat
- 1.Bh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 9
- Sets
- Q(c);N_PINR(E)::R1(E)
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD,XP(D)::S(C)
- B(a);N_GUARD::S(C),XB(a)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- B(f);N_PINS(F)::S(F)
- Tries
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- B(f);N_PINS(F)::S(F)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- Q(c);N_PINR(E)
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- B(a);N_GUARD,XB(G)::S(C)
- B(a);N_GUARD::S(C),XB(a)
- B(f);N_PINS(F)::S(F)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- Q(c);N_PINR(E)
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- Q(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- B(f);N_PINS(F)::S(F)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- P(b);XB(G)
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- B(a);N_GUARD::S(C),XB(a)
- B(f);N_PINS(F)::S(F)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- Q(c);N_PINR(E)
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- B(a);XB(G)::S(C),XB(a)
- Q(c);N_PINR(E)::R1(E)
- B(f);N_PINS(F)::S(F)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- B(a);
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- Q(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- B(f);N_PINS(F)
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- Q(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- B(f);N_PINS(F)
- Try
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- Q(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
- Refutation
- B(f);N_PINS(F)
- Try
- B(J);CHECK
- Refutation
- S(g);XB(J)
- Try
- Q(I);CHECK
- Vars
- Q(c);N_PINR(E),SBLOCK,XQ(I)::R1(E)
- Refutation
- S(g);XQ(I)
- Try
- Q(I);CHECK
- Vars
- B(f);N_PINS(F),XQ(I)::S(F)
- S(g);N_GUARD,P_SPINS(g)::QAB1(I),XS(g)
- Refutation
- S(g);XQ(I)
- Try
- Actual
- B(G);
- Threat
- R1(K)
- Vars
- Q(c);CHECK,OGATE,XR(E)::QAB1(I),XQ(c)
- B(f);CHECK,OGATE,XS(F)::P(B),XB(f)
- Q(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- B(f);N_PINS(F)::S(F)
- S(g);N_GUARD::B(J)
- S(g);N_GUARD::B(J),XS(g)
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).