MESON Chess Problem Database
Problem Display
PID: 132042 (3NR3/3nB3/5p2/5kpQ/4prn1/7p/Kb4Nr/8 w - - 0 1)
Casa, Alex
Die Schwalbe, 1952
#2
6 + 10
SOLUTION
- SOUND
- Sets
- 1...Be5
- 2.Qh7#
- 1...Sge5
- 2.Se3#
- 1...Sde5
- 2.Sh4#
- 1...Be5
- Tries
- 1.Se3+?
- 1...Ke5
- 2.Bc5#
- 1...Sxe3!
- 1...Ke5
- 1.Ba3?
- threat
- 2.Sh4#
- 2.Qh7#
- 1...Rxg2
- 2.Qh7#
- 1...Bxa3
- 2.Qh7#
- 1...Rf1
- 2.Qh7#
- 1...Rf2
- 2.Qh7#
- 1...Rf3
- 2.Qh7#
- 1...Ba1
- 2.Qh7#
- 1...Bc1
- 2.Qh7#
- 1...Bc3
- 2.Qh7#
- 1...Bd4
- 2.Qh7#
- 1...Be5
- 2.Qh7#
- 1...Sf2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sge5
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Sde5
- 2.Sh4#
- 1...Sf8
- 2.Sh4#
- 1...hxg2!
- threat
- 1.Bb4?
- threat
- 2.Sh4#
- 2.Qh7#
- 1...Rxg2
- 2.Qh7#
- 1...Rf1
- 2.Qh7#
- 1...Rf2
- 2.Qh7#
- 1...Rf3
- 2.Qh7#
- 1...Ba1
- 2.Qh7#
- 1...Bc1
- 2.Qh7#
- 1...Ba3
- 2.Qh7#
- 1...Bc3
- 2.Qh7#
- 1...Bd4
- 2.Qh7#
- 1...Be5
- 2.Qh7#
- 1...Sf2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sge5
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Sde5
- 2.Sh4#
- 1...Sf8
- 2.Sh4#
- 1...hxg2!
- threat
- 1.Bc5?
- threat
- 2.Sh4#
- 2.Qh7#
- 1...Rxg2
- 2.Qh7#
- 1...Rf1
- 2.Qh7#
- 1...Rf2
- 2.Qh7#
- 1...Rf3
- 2.Qh7#
- 1...Ba1
- 2.Qh7#
- 1...Bc1
- 2.Qh7#
- 1...Ba3
- 2.Qh7#
- 1...Bc3
- 2.Qh7#
- 1...Bd4
- 2.Qh7#
- 1...Be5
- 2.Qh7#
- 1...Sf2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sge5
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Sde5
- 2.Sh4#
- 1...Sf8
- 2.Sh4#
- 1...hxg2!
- threat
- 1.Bd6?
- threat
- 2.Sh4#
- 2.Qh7#
- 1...Rxg2
- 2.Qh7#
- 1...Ba1
- 2.Qh7#
- 1...Bc1
- 2.Qh7#
- 1...Ba3
- 2.Qh7#
- 1...Bc3
- 2.Qh7#
- 1...Bd4
- 2.Qh7#
- 1...Be5
- 2.Qh7#
- 1...Sf2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sge5
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Sde5
- 2.Sh4#
- 1...Sf8
- 2.Sh4#
- 1...hxg2!
- threat
- 1.Bf8?
- threat
- 2.Sh4#
- 2.Qh7#
- 1...Rxg2
- 2.Qh7#
- 1...Sxf8
- 2.Sh4#
- 1...Rf1
- 2.Qh7#
- 1...Rf2
- 2.Qh7#
- 1...Rf3
- 2.Qh7#
- 1...Ba1
- 2.Qh7#
- 1...Bc1
- 2.Qh7#
- 1...Ba3
- 2.Qh7#
- 1...Bc3
- 2.Qh7#
- 1...Bd4
- 2.Qh7#
- 1...Be5
- 2.Qh7#
- 1...Sf2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sge5
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Sde5
- 2.Sh4#
- 1...hxg2!
- threat
- 1.Se3+?
- Keys
- 1.Bxf6!
- threat
- 2.Qxg5#
- 1...Kxf6
- 2.Qf7#
- 1...Bxf6
- 2.Qh7#
- 1...Sgxf6
- 2.Se3#
- 1...Sdxf6
- 2.Sh4#
- threat
- 1.Bxf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- B(a);P_PINS(B),SBLOCK::QAB(C)
- S(f);N_GUARD,SBLOCK::S(B)
- S(j);SBLOCK::S(B)
- Tries
- Try
- S(B);CHECK
- Vars
- K(g);P-FLIGHT::R(F)+B(D)
- Refutation
- S(f);XS(B)
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- R(b);XS(B)::QAB(C)
- B(a);P_PINS(B),XB(D)::QAB(C)
- R(e);::QAB(C)
- B(a);P_PINS(B)::QAB(C)
- S(f);N_GUARD::S(B)
- S(f);N_GUARD::S(B),XS(f)
- S(j);::S(B)
- Refutation
- P(c);XS(B)
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- R(b);XS(B)::QAB(C)
- R(e);::QAB(C)
- B(a);P_PINS(B)::QAB(C)
- S(f);N_GUARD::S(B)
- S(f);N_GUARD::S(B),XS(f)
- S(j);::S(B)
- Refutation
- P(c);XS(B)
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- R(b);XS(B)::QAB(C)
- R(e);::QAB(C)
- B(a);P_PINS(B)::QAB(C)
- S(f);N_GUARD::S(B)
- S(f);N_GUARD::S(B),XS(f)
- S(j);::S(B)
- Refutation
- P(c);XS(B)
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- R(b);XS(B)::QAB(C)
- B(a);P_PINS(B)::QAB(C)
- S(f);N_GUARD::S(B)
- S(f);N_GUARD::S(B),XS(f)
- S(j);::S(B)
- Refutation
- P(c);XS(B)
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- R(b);XS(B)::QAB(C)
- S(j);XB(D)::S(B)
- R(e);::QAB(C)
- B(a);P_PINS(B)::QAB(C)
- S(f);N_GUARD::S(B)
- S(f);N_GUARD::S(B),XS(f)
- S(j);::S(B)
- Refutation
- P(c);XS(B)
- Try
- Actual
- B(D);XP(i)
- Threat
- QAR1(C),XP(h)
- Vars
- K(g);N_SPINP(h),OGATEB,P-FLIGHT,XB(D)::QAR1(C)
- B(a);P_PINS(B),SBLOCK,XB(D)::QAB(C)
- S(f);N_GUARD,SBLOCK,XB(D)::S(B)
- S(j);SBLOCK,XB(D)::S(B)
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).