MESON Chess Problem Database
Problem Display
PID: 6193 (5R2/6P1/2p1PNpB/K1Q1N1rP/1R1rbk1b/2np1p1B/3pn2P/8 w - - 0 1)
Isaev, Leonid Antonovich
1st Prize, Tijdschrift vd NSB, 1927
#2
12 + 12
| 20 | De Problemist | 1929 |
| 1397 | Faszinierendes Schachproblem | 1963 |
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
SOLUTION
- SOUND
- Sets
- 1...Ke3
- 2.Sfg4#
- 1...Rd5
- 2.Sxg6#
- 2.Sfg4#
- 2.Sfd7#
- 1...Rd6
- 2.Sxg6#
- 2.Sxe4#
- 2.Sfg4#
- 2.Sfd7#
- 2.Sh7#
- 2.Se8#
- 2.Sg8#
- 1...Rd7
- 2.Sxg6#
- 2.Sfxd7#
- 1...Rd8
- 2.Sxg6#
- 2.Se8#
- 1...Ke3
- Tries
- 1.Sc4?
- threat
- 2.Sd5#
- 2.Qe5#
- 1...f2
- 2.Sd5#
- 1...Rd5
- 2.Sxd5#
- 1...Bd5
- 2.Qd6#
- 1...Bf5
- 2.Qe5#
- 1...Sd5
- 2.Sxd5#
- 2.Qd6#
- 1...Rxc4!
- threat
- 1.Seg4?
- threat
- 2.Sd5#
- 2.Qe5#
- 1...Rd5
- 2.Sxd5#
- 1...Sd5
- 2.Sxd5#
- 1...f2
- 2.Sd5#
- 1...Bf5
- 2.Qd6#
- 2.Qe5#
- 1...Bd5!
- threat
- 1.Sxg6+?
- 1...Ke3
- 2.Sg4#
- 1...Bxg6!
- 1...Ke3
- 1.Sed7?
- threat
- 2.Sd5#
- 1...Ke3
- 2.Sg4#
- 1...Rxd7
- 2.Sxd7#
- 1...Rd5
- 2.Sxd5#
- 1...Bf5
- 2.Qe5#
- 1...Sd5
- 2.Sxd5#
- 1...Bd5!
- threat
- 1.Sfd7+?
- 1...Ke3
- 2.Sg4#
- 1...Bf5!
- 1...Ke3
- 1.Sh7+?
- 1...Ke3
- 2.Sg4#
- 1...Bf5!
- 1...Ke3
- 1.Se8+?
- 1...Ke3
- 2.Sg4#
- 1...Bf5!
- 1...Ke3
- 1.Sg8+?
- 1...Ke3
- 2.Sg4#
- 1...Bf5!
- 1...Ke3
- 1.Qxd4?
- threat
- 2.Sxe4#
- 2.Sg4#
- 2.Sd5#
- 2.Sd7#
- 2.Sh7#
- 2.Se8#
- 2.Sg8#
- 1...Sg3
- 2.Sd5#
- 1...Sd5
- 2.Sxd3#
- 2.Sxg6#
- 2.Sxd5#
- 2.Qxe4#
- 1...Sxd4!
- threat
- 1.Sc4?
- Keys
- 1.Qd6!
- threat
- 2.Sd5#
- 1...Rd5+
- 2.Sxd5#
- 1...Ke3
- 2.Sg4#
- 1...Rxd6
- 2.Sg4#
- 1...Bf5
- 2.Seg4#
- 1...Bd5
- 2.Sc4#
- 1...Sd5
- 2.Sc4#
- 2.Sxd5#
- threat
- 1.Qd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- K(h);N_SPINR(j),P_SPINR(f),S_FLIGHT::S(I)
- Tries
- Try
- S(F);P_SPINQ(E)
- Threat
- DUALS(2)
- Vars
- P(e);::R(L)+S(I),DCHECK
- R(f);::R(L)+S(I),DCHECK,XR(f)
- B(g);N_PINQ(E)::QAB(E)
- B(g);N_PINQ(E)::QAB1(E)
- Refutation
- R(f);XS(F)
- Try
- S(F);P_SPINQ(E)
- Threat
- DUALS(2)
- Vars
- R(f);P_SPINB(g)::R(L)+S(I),DCHECK,XR(f)
- S(c);N_PINQ(E)::R(L)+S(I),DCHECK,XS(c)
- P(e);::R(L)+S(I),DCHECK
- Refutation
- B(g);N_PINQ(E),N_SPINR(j),P_SPINR(f)
- Try
- S(F);CHECK,P_SPINQ(E),XP(l)
- Vars
- K(h);N_SPINR(j),P_SPINR(f),S_FLIGHT::S(I)
- Refutation
- B(g);N_SPINR(j),P_SPINR(f),XS(F)
- Try
- S(F);P_SPINQ(E)
- Threat
- R(L)+S(I),DCHECK
- Vars
- K(h);N_SPINR(j),P_SPINR(f),S_FLIGHT::S(I)
- R(f);P_SPINB(g),XS(F)::R(L)+S(I),XR(f)
- R(f);P_SPINB(g)::R(L)+S(I),DCHECK,XR(f)
- B(g);N_PINQ(E),N_SPINR(j),P_SPINR(f)::QAB1(E)
- S(c);N_PINQ(E)::R(L)+S(I),DCHECK,XS(c)
- Refutation
- B(g);N_PINQ(E),N_SPINR(j),P_SPINR(f)
- Try
- S(I);CHECK
- Vars
- K(h);N_SPINR(j),P_SPINR(f),S_FLIGHT::S(F)
- Refutation
- B(g);N_SPINR(j),P_SPINB(g),P_SPINR(f)
- Try
- S(I);CHECK
- Vars
- K(h);N_SPINR(j),P_SPINR(f),S_FLIGHT::S(F)
- Refutation
- B(g);N_SPINR(j),P_SPINB(g),P_SPINR(f)
- Try
- S(I);CHECK
- Vars
- K(h);N_SPINR(j),P_SPINR(f),S_FLIGHT::S(F)
- Refutation
- B(g);N_SPINR(j),P_SPINB(g),P_SPINR(f)
- Try
- S(I);CHECK
- Vars
- K(h);N_SPINR(j),P_SPINR(f),S_FLIGHT::S(F)
- Refutation
- B(g);N_SPINR(j),P_SPINB(g),P_SPINR(f)
- Try
- Q(E);P_PINB(g),P_SPINS(F),XR(f)
- Threat
- DUALS(7)
- Vars
- S(b);::R(L)+S(I),DCHECK
- Refutation
- S(b);N_SPINB(g),XQ(E)
- Try
- Actual
- Q(E);P_SPINS(F)
- Threat
- R(L)+S(I),DCHECK
- Vars
- R(f);CHECK,N_PINS(F),P_SPINB(g)::R(L)+S(I),DCHECK,XR(f)
- K(h);S_FLIGHT::S(I)
- R(f);P_SPINB(g),XQ(E)::R(L)+S(I)
- B(g);N_PINS(F),N_SPINR(j),P_SPINR(f),SBLOCK::QAB(E)+S(F)
- B(g);N_PINS(F),N_SPINR(j),P_SPINR(f)::QAB(E)+S(F)
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).