MESON Chess Problem Database
Problem Display
PID: 262310 (4R3/8/5KN1/3pp3/2pqk3/2p5/2N1P2B/8 w - - 0 1)
Lipton, Michael
Problem (Zagreb), 1961
#2
6 + 6
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Rxe5#
- 1...Qe3
- 2.Rxe5#
- 1...Qc5
- 2.Rxe5#
- 1...Qa7
- 2.Rxe5#
- 1...Qd1
- 2.Rxe5#
- 1...Qd2
- 2.Rxe5#
- 1...Qd3
- 2.Rxe5#
- 1...Qg1
- Tries
- 1.Sf4?
- 1...Qg1
- 2.Rxe5#
- 1...Qf2
- 2.Rxe5#
- 1...Qe3
- 2.Rxe5#
- 1...Qc5
- 2.Rxe5#
- 1...Qa7
- 2.Rxe5#
- 1...Qd1
- 2.Rxe5#
- 1...Qd2
- 2.Rxe5#
- 1...Qd3
- 2.Rxe5#
- 1...Qb6+!
- 1...Qg1
- 1.Sxe5?
- 1...Qf2+
- 2.Sf3#
- 1...Qxe5+
- 2.Rxe5#
- 1...Qb6+
- 2.Sc6#
- 1...Qg1
- 2.Sd3#
- 2.Sf3#
- 2.Sxc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qe3
- 2.Sd3#
- 2.Sf3#
- 2.Sxc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qa7
- 2.Sd7#
- 1...Qd1
- 2.Sd3#
- 2.Sf3#
- 2.Sxc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qd2
- 2.Sd3#
- 2.Sf3#
- 2.Sxc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qd3
- 2.Sxd3#
- 2.Sf3#
- 2.Sxc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qc5!
- 1...Qf2+
- 1.Bf4?
- 1...Qg1
- 2.Rxe5#
- 1...Qf2
- 2.Rxe5#
- 1...Qe3
- 2.Rxe5#
- 1...Qc5
- 2.Rxe5#
- 1...Qa7
- 2.Rxe5#
- 1...Qd1
- 2.Rxe5#
- 1...Qd2
- 2.Rxe5#
- 1...Qd3
- 2.Rxe5#
- 1...Qb6+!
- 1...Qg1
- 1.Sf4?
- Keys
- 1.Bxe5!
- threat
- 2.Bxd4#
- 1...Qf2+
- 2.Bf4#
- 1...Qxe5+
- 2.Rxe5#
- 1...Qb6+
- 2.Bd6#
- 1...Qg1
- 2.Bh2#
- 2.Bxc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Qe3
- 2.Bh2#
- 2.Bxc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Qc5
- 2.Bd6#
- 1...Qa7
- 2.Bc7#
- 1...Qd1
- 2.Bh2#
- 2.Bxc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Qd2
- 2.Bh2#
- 2.Bxc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Qd3
- 2.Bh2#
- 2.Bxc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- threat
- 1.Bxe5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(c);N_GUARD::R1(F),XP(f)
- Tries
- Try
- S(E);
- Vars
- Q(c);N_GUARD::R1(F),XP(f)
- Q(c);N_GUARD,P_PINS(E)::R1(F),XP(f)
- Refutation
- Q(c);CHECK
- Try
- S(E);P_SPINS(E),XP(f)
- Vars
- Q(c);CHECK,N_PINS(E)::R(F)+S(E)
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::R1(F),XQ(c)
- Q(c);N_PINS(E)::R(F)+S(E)
- Refutation
- Q(c);N_PINS(E)
- Try
- B(C);
- Vars
- Q(c);N_GUARD::R1(F),XP(f)
- Q(c);N_GUARD,P_PINB(C)::R1(F),XP(f)
- Refutation
- Q(c);CHECK
- Try
- Actual
- B(C);P_SPINB(C),XP(f)
- Threat
- R(F)+B(C),XQ(c)
- Vars
- Q(c);CHECK,N_PINB(C)::R(F)+B(C)
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(C)::R1(F),XQ(c)
- Q(c);N_PINB(C)::R(F)+B(C)
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).