MESON Chess Problem Database
Problem Display
PID: 237268 (4R1n1/8/2Q1Pk2/q4PR1/3P3K/b1N5/8/1b6 w - - 0 1)
Ahues, Herbert Siegfried Oskar
Schweizerische Schachzeitung, 2014
#2
8 + 5
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Sd5#
- 1...Qb6
- 2.Sd5#
- 1...Qc7
- 2.Sd5#
- 1...Qa4
- 2.Sd5#
- 1...Qd5
- 2.Sxd5#
- 1...Qa6
- 2.Sd5#
- 1...Qa7
- 2.Sd5#
- 1...Qa8
- 2.Sd5#
- 1...Ba2
- 2.Se4#
- 1...Be4
- 2.Sxe4#
- 1...Bc5
- 2.Sd5#
- 1...Se7
- 2.Rf8#
- 1...Qb4
- Tries
- 1.Qe4?
- threat
- 2.Rg6#
- 1...Bxe4
- 2.Sxe4#
- 1...Se7
- 2.Rf8#
- 1...Qxf5!
- threat
- 1.Qb5?
- threat
- 2.Sd5#
- 2.Rg6#
- 1...Qxc3
- 2.Rg6#
- 2.Qe5#
- 1...Bxf5
- 2.Sd5#
- 1...Qd8
- 2.Rg6#
- 2.Qe5#
- 1...Qa8
- 2.Rg6#
- 2.Qe5#
- 1...Ba2
- 2.Se4#
- 2.Rg6#
- 1...Be4
- 2.Sxe4#
- 2.Rg6#
- 1...Bc5
- 2.Sd5#
- 1...Se7
- 2.Rf8#
- 1...Qxb5!
- threat
- 1.Qd5?
- threat
- 2.Rg6#
- 1...Qxd5
- 2.Sxd5#
- 1...Se7
- 2.Rf8#
- 1...Bxf5!
- threat
- 1.Qb7?
- threat
- 2.Qf7#
- 2.Qg7#
- 1...Qc7
- 2.Sd5#
- 1...Qa7
- 2.Sd5#
- 1...Bf8
- 2.Rxf8#
- 2.Qf7#
- 1...Sh6
- 2.Qg7#
- 1...Se7
- 2.Rf8#
- 1...Be7!
- threat
- 1.Qd7?
- threat
- 2.Qf7#
- 2.Qg7#
- 1...Qc7
- 2.Sd5#
- 1...Qa7
- 2.Sd5#
- 1...Bf8
- 2.Rxf8#
- 2.Qf7#
- 1...Sh6
- 2.Qg7#
- 1...Se7
- 2.Rf8#
- 1...Be7!
- threat
- 1.Qc5?
- threat
- 2.Sd5#
- 2.Rg6#
- 2.Rf8#
- 1...Qxc3
- 2.Rg6#
- 2.Rf8#
- 2.Qe5#
- 1...Bxf5
- 2.Sd5#
- 1...Bxc5
- 2.Sd5#
- 1...Qc7
- 2.Sd5#
- 2.Rg6#
- 1...Qd8
- 2.Rg6#
- 2.Qe5#
- 1...Qa7
- 2.Sd5#
- 2.Rg6#
- 2.Qe5#
- 1...Qa8
- 2.Rg6#
- 2.Qe5#
- 1...Ba2
- 2.Se4#
- 2.Rg6#
- 2.Rf8#
- 1...Be4
- 2.Sxe4#
- 2.Rg6#
- 2.Rf8#
- 1...Sh6
- 2.Sd5#
- 2.Rg6#
- 1...Se7
- 2.Rf8#
- 1...Qxc5!
- threat
- 1.Qc7?
- threat
- 2.Qf7#
- 2.Qg7#
- 1...Qxc7
- 2.Sd5#
- 1...Qa7
- 2.Sd5#
- 2.Qe5#
- 1...Bf8
- 2.Rxf8#
- 2.Qf7#
- 1...Sh6
- 2.Qg7#
- 1...Se7
- 2.Rf8#
- 1...Be7!
- threat
- 1.e7+?
- 1...Kf7
- 2.Qg6#
- 1...Bd6!
- 1...Kf7
- 1.Qe4?
- Keys
- 1.Qf3!
- threat
- 2.Rg6#
- 1...Qxf5
- 2.Sd5#
- 1...Bxf5
- 2.Se4#
- 1...Se7
- 2.Rf8#
- threat
- 1.Qf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- Q(c);N_GUARD,P_PINP(B)::S(A)
- Q(c);N_GUARD::S(A)
- Q(c);N_GUARD::S(A),XQ(c)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD::S(A),XB(a)
- B(b);S_CUTQ(c)::S(A)
- S(e);SBLOCK,S_CUTB(b)::R(H)
- Tries
- Try
- Q(F);
- Threat
- R1(E)
- Vars
- B(a);XQ(F)::S(A),XB(a)
- S(e);SBLOCK,S_CUTB(b)::R(H)
- Refutation
- Q(c);XP(D)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(a);XP(D)::S(A)
- B(b);::S(A)
- S(e);SBLOCK,S_CUTB(b)::R(H)
- Refutation
- Q(c);XQ(F)
- Try
- Q(F);
- Threat
- R1(E)
- Vars
- Q(c);XQ(F)::S(A),XQ(c)
- S(e);SBLOCK,S_CUTB(b)::R(H)
- Refutation
- B(a);XP(D)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD::S(A)
- S(e);::QAB1(F)
- S(e);S_CUTB(b)::R(H)
- Refutation
- B(b);
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD::S(A)
- S(e);::QAB1(F)
- S(e);S_CUTB(b)::R(H)
- Refutation
- B(b);
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- B(a);XP(D)::S(A)
- B(b);XQ(F)::S(A)
- S(e);::R(H)
- Refutation
- Q(c);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD,XQ(F)::S(A)
- S(e);::QAB1(F)
- S(e);S_CUTB(b)::R(H)
- Refutation
- B(b);
- Try
- P(G);CHECK
- Vars
- K(d);OGATE,P-FLIGHT::QAB1(F)
- Refutation
- B(b);P_SPINB(b)
- Try
- Actual
- Q(F);
- Threat
- R1(E)
- Vars
- Q(c);N_GUARD,P_SPINQ(c),XP(D)::S(A)
- B(a);N_GUARD,P_SPINB(a),XP(D)::S(A)
- S(e);SBLOCK,S_CUTB(b)::R(H)
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).