MESON Chess Problem Database
Problem Display
PID: 54307 (1Q6/p7/4pr2/2p2n2/ppk1N2b/3R2p1/1PP3B1/4KnB1 w - - 0 1)
Strerath, Otto
2nd Prize, Schach, 1955
#2
8 + 11
| 56 | The Problemist | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Sd2
- 2.Sxd2#
- 1...Sh2
- 2.Sd2#
- 1...S1e3
- 2.Sd2#
- 1...S5e3
- 2.Sd6#
- 1...Sd4
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sh6
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...a3
- 2.b3#
- 1...Sd2
- Tries
- 1.Bxc5?
- threat
- 2.Qxb4#
- 1...Sd4
- 2.Rxd4#
- 1...b3
- 2.Qb4#
- 1...a5!
- threat
- 1.Bxf1?
- threat
- 2.Sd2#
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sd4
- 2.Rxd4#
- 1...Bg5
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Se3
- 2.Sd2#
- 2.Sd6#
- 1...Sd6
- 2.Sd2#
- 2.Sxd6#
- 2.Rd4#
- 1...Sh6
- 2.Sd2#
- 2.Sd6#
- 2.Rd4#
- 1...Se7
- 2.Sd2#
- 2.Sd6#
- 2.Rd4#
- 1...Sg7
- 2.Sd2#
- 2.Sd6#
- 2.Rd4#
- 1...g2+!
- threat
- 1.Rd1?
- threat
- 2.Bxf1#
- 1...Sd2
- 2.Sxd2#
- 1...Sd4
- 2.Sd6#
- 1...Sh2
- 2.Sd2#
- 1...S5e3
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sh6
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...S1e3!
- threat
- 1.Rc3+?
- 1...Kd5
- 2.Sd2#
- 2.Sxg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sxf6#
- 2.Rxc5#
- 1...bxc3!
- 1...Kd5
- 1.Rd4+?
- 1...Sxd4
- 2.Sd6#
- 1...cxd4!
- 1...Sxd4
- 1.Rd7?
- threat
- 2.Bxf1#
- 1...Sd6
- 2.Sxd6#
- 1...Sd2
- 2.Sxd2#
- 1...Sh2
- 2.Sd2#
- 1...S1e3
- 2.Sd2#
- 1...Sd4
- 2.Sd6#
- 1...Sh6
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...S5e3!
- threat
- 1.Rd8?
- threat
- 2.Bxf1#
- 1...Sd6
- 2.Sxd6#
- 1...Sd2
- 2.Sxd2#
- 1...Sh2
- 2.Sd2#
- 1...S1e3
- 2.Sd2#
- 1...Sd4
- 2.Sd6#
- 1...Sh6
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...S5e3!
- threat
- 1.Qf4?
- threat
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Kb5!
- threat
- 1.Qd6?
- threat
- 2.Qxc5#
- 2.Qa6#
- 1...Sxd6
- 2.Sxd6#
- 1...b3
- 2.Qxc5#
- 1...Sd4
- 2.Qxc5#
- 1...e5
- 2.Qxc5#
- 1...a6
- 2.Qxc5#
- 2.Qxa6#
- 1...Kb5!
- threat
- 1.Qxa7?
- threat
- 2.Qxc5#
- 2.Qa6#
- 1...Sd4
- 2.Sd6#
- 2.Qxc5#
- 1...b3
- 2.Qxc5#
- 2.Qxa4#
- 1...Sd6
- 2.Sxd6#
- 2.Qxc5#
- 1...e5
- 2.Qxc5#
- 1...Kb5!
- threat
- 1.Qb6?
- threat
- 2.Qxc5#
- 2.Qa6#
- 1...Sd4
- 2.Sd6#
- 2.Qxc5#
- 1...Sd6
- 2.Sxd6#
- 2.Qxc5#
- 1...b3
- 2.Qxc5#
- 1...e5
- 2.Qxc5#
- 1...a6
- 2.Qxc5#
- 2.Qxa6#
- 1...axb6!
- threat
- 1.Qb7?
- threat
- 2.Qa6#
- 1...Sd4
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...b3
- 2.Rc3#
- 1...a6
- 2.Qxa6#
- 1...e5!
- threat
- 1.Qc8?
- threat
- 2.Qa6#
- 2.Qxc5#
- 1...Sd4
- 2.Sd6#
- 2.Qxc5#
- 1...b3
- 2.Qxc5#
- 1...Sd6
- 2.Sxd6#
- 2.Qxc5#
- 1...e5
- 2.Qxc5#
- 1...a6
- 2.Qxa6#
- 2.Qxc5#
- 1...Kb5!
- threat
- 1.Bxc5?
- Keys
- 1.Rd5!
- threat
- 2.Rxc5#
- 1...Kxd5
- 2.Sd2#
- 1...exd5
- 2.Bxf1#
- 1...S1e3
- 2.Sd2#
- 1...S5e3
- 2.Sd6#
- threat
- 1.Rd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- S(a);N_GUARD::S(G),XS(a)
- S(a);N_GUARD::S(G)
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- P(c);N_GUARD::P(C)
- Tries
- Try
- B(B);XP(g)
- Threat
- QAR1(H),XP(d)
- Vars
- S(h);N_GUARD::R1(F),XS(h)
- P(d);::QAR1(H)
- Refutation
- P(k);
- Try
- B(E);XS(a)
- Threat
- DUALS(7)
- Vars
- S(h);::B(E)+R(F),DCHECK,XS(h)
- Refutation
- P(b);CHECK
- Try
- R(F);
- Threat
- B(E),XS(a)
- Vars
- S(a);N_GUARD::S(G),XS(a)
- S(h);N_GUARD::S(G)
- S(a);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- Refutation
- S(a);
- Try
- R(F);CHECK
- Refutation
- P(d);XR(F)
- Try
- R(F);CHECK
- Vars
- S(h);XR(F)::S(G)
- Refutation
- P(g);XR(F)
- Try
- R(F);
- Threat
- B(E),XS(a)
- Vars
- S(h);N_GUARD::S(G),XS(h)
- S(a);N_GUARD::S(G),XS(a)
- S(a);N_GUARD::S(G)
- S(h);N_GUARD::S(G)
- Refutation
- S(h);
- Try
- R(F);
- Threat
- B(E),XS(a)
- Vars
- S(h);N_GUARD::S(G),XS(h)
- S(a);N_GUARD::S(G),XS(a)
- S(a);N_GUARD::S(G)
- S(h);N_GUARD::S(G)
- Refutation
- S(h);
- Try
- Q(H);
- Threat
- QAR(H)+S(G),DCHECK
- Vars
- S(h);::QAR(H)+S(G),DCHECK,XS(h)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- S(h);XQ(H)::S(G),XS(h)
- P(d);::QAR1(H),XP(g)
- S(h);::QAR1(H),XP(g)
- P(i);::QAR1(H),XP(g)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(H);XP(k)
- Threat
- DUALS(2)
- Vars
- P(i);::QAR1(H),XP(g)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- P(d);::QAR1(H),XP(g)
- P(i);::QAR1(H),XP(g)
- Refutation
- P(k);XQ(H)
- Try
- Q(H);
- Threat
- QAB(H)
- Vars
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- P(d);N_GUARD::R1(F)
- P(k);::QAB(H),XP(k)
- Refutation
- P(i);
- Try
- Q(H);P_PINP(g)
- Threat
- DUALS(2)
- Vars
- P(d);::QAR1(H),XP(g)
- P(i);::QAR1(H),XP(g)
- Refutation
- K(e);N_SPINP(g),S_FLIGHT
- Try
- Actual
- R(F);
- Threat
- R1(F),XP(g)
- Vars
- K(e);S_FLIGHT,XR(F)::B(E)+S(G)
- P(i);SBLOCK,XR(F)::B(E),XS(a)
- S(a);N_GUARD::S(G)
- S(h);N_GUARD::S(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).