MESON Chess Problem Database
Problem Display
PID: 53104 (KBB5/8/3P1p2/R1NNk3/4prb1/8/3R4/1Q1n1rbq w - - 0 1)
Boros, Sandor
9th Prize, Budapest Chess Club, 1931
#2
9 + 9
| 249 | Schach-Echo | 1933 |
SOLUTION
- SOUND
- Sets
- 1...Rf3
- 2.Qxe4#
- 1...Rf5
- 2.d7#
- 1...Bf5
- 2.d7#
- 1...Sf2
- 2.Qb2#
- 1...Se3
- 2.Qb2#
- 1...e3
- 2.d7#
- 1...f5
- 2.d7#
- 1...Rf3
- Tries
- 1.Sd3+?
- 1...Kd4
- 2.Qb4#
- 1...exd3!
- 1...Kd4
- 1.Se3?
- threat
- 2.Sc4#
- 2.Sb3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Rd5#
- 2.d7#
- 1...Bxc8
- 2.Rd5#
- 2.d7#
- 1...Sxe3
- 2.Qb2#
- 1...R4f2
- 2.Se6#
- 2.d7#
- 1...R4f3
- 2.Se6#
- 2.Qxe4#
- 2.d7#
- 1...Rf5
- 2.Se6#
- 2.d7#
- 1...f5
- 2.Sxe4#
- 1...Be2
- 2.Rd5#
- 2.d7#
- 1...Be6
- 2.Sxe6#
- 2.Sd7#
- 2.d7#
- 1...Bd7
- 2.Rd5#
- 1...Sb2
- 2.Sb3#
- 2.Sa4#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Rd5#
- 2.Qxb2#
- 2.d7#
- 1...Sc3
- 2.Sc4#
- 2.d7#
- 1...Bxe3!
- threat
- 1.Sb4?
- threat
- 2.Sc6#
- 2.Rd5#
- 1...e3+
- 2.Se4#
- 1...Bxc8
- 2.Rd5#
- 1...R4f2
- 2.Se6#
- 1...R4f3
- 2.Qxe4#
- 1...Rf5
- 2.d7#
- 1...Be6
- 2.Sd7#
- 1...Bd7
- 2.Rd5#
- 1...Bd4
- 2.Scd3#
- 1...Sc3
- 2.Sc6#
- 1...Se3
- 2.Sc6#
- 2.Qb2#
- 1...f5!
- threat
- 1.Se7?
- threat
- 2.Sc6#
- 2.Sg6#
- 2.Rd5#
- 2.d7#
- 1...e3+
- 2.Se4#
- 1...Bxc5
- 2.Sc6#
- 2.Sg6#
- 2.Rd5#
- 2.Rxc5#
- 1...Bxc8
- 2.Rd5#
- 2.d7#
- 1...R4f2
- 2.Se6#
- 2.Sg6#
- 2.d7#
- 1...R4f3
- 2.Sg6#
- 2.Qxe4#
- 2.d7#
- 1...Rf5
- 2.Sg6#
- 2.d7#
- 1...Qh5
- 2.Sc6#
- 2.Rd5#
- 2.d7#
- 1...Qh6
- 2.Sc6#
- 2.Rd5#
- 2.d7#
- 1...Qh7
- 2.Sc6#
- 2.Rd5#
- 2.d7#
- 1...Bd4
- 2.Sd3#
- 2.d7#
- 1...Bf5
- 2.Sc6#
- 2.Rd5#
- 2.d7#
- 1...Bh5
- 2.Sc6#
- 2.Rd5#
- 2.d7#
- 1...Be6
- 2.Sd7#
- 2.d7#
- 1...Bd7
- 2.Rd5#
- 1...Sc3
- 2.Sc6#
- 2.Sg6#
- 2.d7#
- 1...Se3
- 2.Sc6#
- 2.Sg6#
- 2.Qb2#
- 2.d7#
- 1...f5!
- threat
- 1.Sd3+?
- Keys
- 1.Sb6!
- threat
- 2.Sc4#
- 2.Rd5#
- 1...e3+
- 2.Se4#
- 1...Bxc8
- 2.Rd5#
- 1...R4f2
- 2.Se6#
- 1...R4f3
- 2.Qxe4#
- 1...Rf5
- 2.d7#
- 1...Be6
- 2.Scd7#
- 1...Bd7
- 2.Rd5#
- 1...f5
- 2.Sbd7#
- 1...Bd4
- 2.Sd3#
- 1...Be2
- 2.Rd5#
- 1...Sb2
- 2.Rd5#
- 1...Sc3
- 2.Sc4#
- 1...Se3
- 2.Qb2#
- threat
- 1.Sb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 8
- REMOVED MATES = 2
- Sets
- R(f);N_GUARD,S_CUTQ(d)::QAR1(A),XP(e)
- R(f);SBLOCK::B(H)+P(F)
- B(g);SBLOCK::B(H)+P(F)
- S(a);N_GUARD,S_CUTB(c)::QAB(A)
- P(e);P_PINS(E)::B(H)+P(F)
- P(i);SBLOCK::B(H)+P(F)
- Tries
- Try
- S(D);CHECK
- Vars
- K(h);S_FLIGHT::QAR2(A)
- Refutation
- P(e);P_PINS(E),XS(D)
- Try
- S(E);
- Threat
- DUALS(9)
- Vars
- S(a);N_GUARD,XS(E)::QAB(A)
- P(i);::R(C)+S(D),XP(e)
- B(g);::R1(B)
- Refutation
- B(c);XS(E)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- P(e);CHECK,S_CUTB(c)::R(C)+S(D)
- B(g);XB(I)::R1(B)
- R(f);S_CUTB(c)::R(C)+S(D)
- R(f);N_GUARD,S_CUTQ(d)::QAR1(A),XP(e)
- R(f);SBLOCK::B(H)+P(F)
- B(g);SBLOCK::R(C)+S(D),DCHECK
- B(g);::R1(B)
- B(c);SBLOCK::R(C)+S(D),DCHECK
- S(a);::S(E)
- Refutation
- P(i);
- Try
- S(E);
- Threat
- DUALS(4)
- Vars
- P(e);CHECK,S_CUTB(c)::R(C)+S(D)
- B(g);::R1(B)
- Refutation
- P(i);
- Try
- Actual
- S(E);
- Threat
- DUALS(2)
- Vars
- P(e);CHECK,S_CUTB(c)::R(C)+S(D)
- B(g);XB(I)::R1(B)
- R(f);S_CUTB(c)::R(C)+S(D)
- R(f);N_GUARD,S_CUTQ(d)::QAR1(A),XP(e)
- R(f);SBLOCK::B(H)+P(F)
- B(g);SBLOCK::R(C)+S(D),DCHECK
- B(g);::R1(B)
- P(i);SBLOCK,S_CUTB(g)::S(E)
- B(c);SBLOCK::R(C)+S(D),DCHECK
- S(a);::R1(B)
- S(a);::S(E)
- S(a);N_GUARD,S_CUTB(c)::QAB(A)
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).