MESON Chess Problem Database
Problem Display
PID: 220411 (2q4B/1n2P1Rp/NQ6/p1N4r/3kP2p/1B1p1P2/5P2/3K4 w - - 0 1)
Koppe, Fred
Freie Presse, 1976
#2
11 + 8
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kc3
- 2.Sa4#
- 1...Ke5
- 2.Sxd3#
- 1...Qh3
- 2.Rg5#
- 1...Qg4
- 2.Rg5#
- 1...Qd7
- 2.Rg5#
- 1...Qxc5
- 2.Rg5#
- 1...Rxc5
- 2.Rg8#
- 1...Sd8
- 2.Rg5#
- 1...Kc3
- Tries
- 1.Se6+?
- 1...Ke5
- 2.Rg5#
- 2.Rg8#
- 2.Qd4#
- 1...Kc3!
- 1...Ke5
- 1.Sxb7+?
- 1...Ke5
- 2.Qd6#
- 1...Qc5
- 2.Rg5#
- 1...Rc5
- 2.Rg8#
- 1...Kc3!
- 1...Ke5
- 1.Bd5?
- threat
- 2.Qb2#
- 1...Kc3
- 2.Sa4#
- 1...Ke5
- 2.Sxd3#
- 1...Qxc5
- 2.Rg5#
- 1...Rxd5!
- threat
- 1.Qd8+?
- 1...Kc3
- 2.Rg5#
- 1...Ke5
- 2.Rg4#
- 2.Rf7#
- 1...Qd7
- 2.Rg5#
- 1...Rd5
- 2.Rg1#
- 2.Rg2#
- 2.Rg3#
- 2.Rg4#
- 2.Rg5#
- 2.Rg6#
- 2.Rf7#
- 2.Rxh7#
- 2.Rg8#
- 1...Sd6
- 2.Rg5#
- 1...Sxd8
- 2.Rg5#
- 1...Qxd8!
- 1...Kc3
- 1.e8Q?
- threat
- 2.Rg5#
- 2.Rd7#
- 1...Kc3
- 2.Sa4#
- 2.Rg5#
- 1...Qxe8
- 2.Rd7#
- 1...Qe6
- 2.Rd7#
- 1...Qf5
- 2.Rd7#
- 1...Qd7
- 2.Rxd7#
- 1...Qc6
- 2.Rd7#
- 1...Qc7
- 2.Rd7#
- 1...Qb8
- 2.Rd7#
- 1...Qd8
- 2.Rd7#
- 1...Rd5
- 2.Rd7#
- 1...Rf5
- 2.Rd7#
- 1...Rg5
- 2.Rxg5#
- 2.Rd7#
- 1...Rh6
- 2.Rg6#
- 2.Rd7#
- 1...Sd6
- 2.Rg5#
- 1...Re5!
- threat
- 1.e8S?
- threat
- 2.Rg5#
- 2.Rd7#
- 1...Kc3
- 2.Sa4#
- 2.Rg5#
- 1...Ke5
- 2.Sxd3#
- 2.Rg4#
- 2.Rf7#
- 2.Qf6#
- 1...Qxe8
- 2.Rd7#
- 1...Qf5
- 2.Rd7#
- 1...Qe6
- 2.Rd7#
- 1...Qd7
- 2.Rxd7#
- 1...Qc6
- 2.Rd7#
- 1...Qc7
- 2.Rd7#
- 1...Qb8
- 2.Rd7#
- 1...Qd8
- 2.Rd7#
- 1...Rd5
- 2.Rd7#
- 1...Rf5
- 2.Rd7#
- 1...Rg5
- 2.Rxg5#
- 2.Rd7#
- 1...Rh6
- 2.Rg6#
- 2.Rd7#
- 1...Sd6
- 2.Rg5#
- 1...Re5!
- threat
- 1.e8B?
- threat
- 2.Rg5#
- 2.Rd7#
- 1...Kc3
- 2.Sa4#
- 2.Rg5#
- 1...Ke5
- 2.Sxd3#
- 2.Rg4#
- 2.Rf7#
- 1...Qxe8
- 2.Rd7#
- 1...Qf5
- 2.Rd7#
- 1...Qe6
- 2.Rd7#
- 1...Qd7
- 2.Rxd7#
- 1...Qc6
- 2.Rd7#
- 1...Qc7
- 2.Rd7#
- 1...Qb8
- 2.Rd7#
- 1...Qd8
- 2.Rd7#
- 1...Rd5
- 2.Rd7#
- 1...Rf5
- 2.Rd7#
- 1...Rg5
- 2.Rxg5#
- 2.Rd7#
- 1...Rh6
- 2.Rg6#
- 2.Rd7#
- 1...Sd6
- 2.Rg5#
- 1...Re5!
- threat
- 1.e8R?
- threat
- 2.Rg5#
- 2.Rd7#
- 1...Kc3
- 2.Sa4#
- 2.Rg5#
- 1...Qxe8
- 2.Rd7#
- 1...Qe6
- 2.Rd7#
- 1...Qf5
- 2.Rd7#
- 1...Qd7
- 2.Rxd7#
- 1...Qc6
- 2.Rd7#
- 1...Qc7
- 2.Rd7#
- 1...Qb8
- 2.Rd7#
- 1...Qd8
- 2.Rd7#
- 1...Rd5
- 2.Rd7#
- 1...Rf5
- 2.Rd7#
- 1...Rg5
- 2.Rxg5#
- 2.Rd7#
- 1...Rh6
- 2.Rg6#
- 2.Rd7#
- 1...Sd6
- 2.Rg5#
- 1...Re5!
- threat
- 1.Se6+?
- Keys
- 1.Ba2!
- threat
- 2.Qb2#
- 1...Kc3
- 2.Sa4#
- 1...Ke5
- 2.Sxd3#
- 1...Qxc5
- 2.Rg5#
- 1...Rxc5
- 2.Rg8#
- threat
- 1.Ba2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- K(b);S_FLIGHT::S(F)
- K(b);S_FLIGHT::S(F),XP(a)
- Q(h);N_GUARD::B(K)+R(J)
- Q(h);N_GUARD,P_PINP(D)::B(K)+R(J)
- Q(h);N_GUARD,P_SPINQ(h),XS(F)::B(K)+R(J)
- R(e);N_GUARD,P_SPINR(e),XS(F)::B(K)+R(J)
- S(f);S_CUTQ(h)::B(K)+R(J)
- Tries
- Try
- S(F);CHECK
- Refutation
- K(b);S_FLIGHT
- Try
- S(F);CHECK,XS(f)
- Vars
- K(b);S_FLIGHT::QAB1(H)
- Q(h);P_SPINQ(h)::B(K)+R(J)
- R(e);P_SPINR(e)::B(K)+R(J)
- Refutation
- K(b);S_FLIGHT
- Try
- B(C);
- Threat
- QAB(H)
- Vars
- K(b);S_FLIGHT::S(F)
- K(b);S_FLIGHT::S(F),XP(a)
- Q(h);N_GUARD,P_SPINQ(h),XS(F)::B(K)+R(J)
- Refutation
- R(e);XB(C)
- Try
- Q(H);CHECK
- Vars
- K(b);S_FLIGHT::B(K)+R(J)
- Q(h);P_SPINQ(h)::B(K)+R(J)
- S(f);P_SPINS(f)::B(K)+R(J)
- S(f);XQ(H)::B(K)+R(J)
- Refutation
- Q(h);XQ(H)
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(h);XQ(I)::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK,XQ(h)
- R(e);::B(K)+R(J)
- R(e);::B(K)+R(J),DCHECK
- S(f);::B(K)+R(J)
- Refutation
- R(e);
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(h);XS(I)::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK,XQ(h)
- R(e);::B(K)+R(J)
- R(e);::B(K)+R(J),DCHECK
- S(f);::B(K)+R(J)
- Refutation
- R(e);
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(h);XB(I)::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK,XQ(h)
- R(e);::B(K)+R(J)
- R(e);::B(K)+R(J),DCHECK
- S(f);::B(K)+R(J)
- Refutation
- R(e);
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(h);XR(I)::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK
- Q(h);::B(K)+R(J),DCHECK,XQ(h)
- R(e);::B(K)+R(J)
- R(e);::B(K)+R(J),DCHECK
- S(f);::B(K)+R(J)
- Refutation
- R(e);
- Try
- Actual
- B(C);
- Threat
- QAB(H)
- Vars
- K(b);S_FLIGHT::S(F)
- K(b);S_FLIGHT::S(F),XP(a)
- Q(h);N_GUARD,P_SPINQ(h),XS(F)::B(K)+R(J)
- R(e);N_GUARD,P_SPINR(e),XS(F)::B(K)+R(J)
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).