MESON Chess Problem Database
Problem Display
PID: 84974 (5Br1/pK4p1/rbPP2Q1/3Nkn2/R7/R6b/B3NP1q/4n3 w - - 0 1)
Petite, Efren
Die Schwalbe, 1970
#2
11 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.f4#
- 1...Qh1
- 2.f4#
- 1...Qg2
- 2.f4#
- 1...Se3
- 2.Re4#
- 2.Qe4#
- 1...Sg3
- 2.f4#
- 1...Sd4
- 2.Re3#
- 1...Sh4
- 2.Re4#
- 2.Qe4#
- 1...Sxd6+
- 2.Bxd6#
- 1...Sh6
- 2.Re4#
- 2.Qe4#
- 1...Se7
- 2.Re4#
- 1...Qg1
- Tries
- 1.Sdc3?
- threat
- 2.Re4#
- 2.Qe6#
- 1...Sxd6+
- 2.Bxd6#
- 1...Rxa4
- 2.Qe6#
- 1...Qf4
- 2.Qe6#
- 1...Qh1
- 2.Qe6#
- 2.f4#
- 1...Qg2
- 2.Qe6#
- 2.f4#
- 1...Bg2
- 2.Qe6#
- 1...Bd4
- 2.Qe6#
- 1...Se3
- 2.Re4#
- 1...Sg3
- 2.f4#
- 1...Sh4
- 2.Re4#
- 1...Sh6
- 2.Re4#
- 1...Se7
- 2.Re4#
- 1...Sd4!
- threat
- 1.Se3?
- threat
- 2.Qe6#
- 1...Sxd6+
- 2.Bxd6#
- 2.Qxd6#
- 1...Sxe3
- 2.Re4#
- 1...Sg3
- 2.f4#
- 1...Sh4
- 2.Re4#
- 1...Sh6
- 2.Re4#
- 1...Se7
- 2.Re4#
- 1...Sd4!
- threat
- 1.Sdf4?
- threat
- 2.Qe6#
- 1...Sxd6+
- 2.Bxd6#
- 1...Sd4
- 2.Re3#
- 1...Se3
- 2.Re4#
- 1...Sh4
- 2.Re4#
- 1...Sh6
- 2.Re4#
- 1...Se7
- 2.Re4#
- 1...Sg3!
- threat
- 1.Sxb6?
- threat
- 2.Sd7#
- 2.Qe6#
- 1...Sxd6+
- 2.Bxd6#
- 1...Rxa4
- 2.Qe6#
- 1...axb6
- 2.Qe6#
- 1...Sd4
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 2.Re4#
- 1...Sg3
- 2.f4#
- 1...Sh4
- 2.Re3#
- 2.Re4#
- 1...Sh6
- 2.Re3#
- 2.Re4#
- 1...Se7
- 2.Re3#
- 2.Re4#
- 1...Rxb6+!
- threat
- 1.Se7?
- threat
- 2.Qe6#
- 1...Sxe7
- 2.Re4#
- 1...Sd4
- 2.Re3#
- 1...Se3
- 2.Re4#
- 1...Sg3
- 2.f4#
- 1...Sh4
- 2.Re4#
- 1...Sh6
- 2.Re4#
- 1...Sxd6+!
- threat
- 1.Bxg7+?
- 1...Sxg7
- 2.Re4#
- 2.Qf6#
- 1...Rxg7+!
- 1...Sxg7
- 1.Re3+?
- 1...Sxe3
- 2.Re4#
- 2.Qe4#
- 1...Bxe3!
- 1...Sxe3
- 1.Sdc3?
- Keys
- 1.Sc7!
- threat
- 2.Qe6#
- 1...Sxd6+
- 2.Bxd6#
- 1...Sd4
- 2.Re3#
- 1...Se3
- 2.Re4#
- 1...Sg3
- 2.f4#
- 1...Sh4
- 2.Re4#
- 1...Sh6
- 2.Re4#
- 1...Se7
- 2.Re4#
- threat
- 1.Sc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(b);N_GUARD::P(C)
- S(e);S_CUTQ(b)::P(C)
- S(e);N_GUARD,S_CUTB(g)::R(D)
- S(e);CHECK,OGATE,XP(H)::B(K),XS(e)
- S(e);::R1(E)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- S(e);CHECK,OGATE,XP(H)::B(K),XS(e)
- R(f);XR(E)::QAR1(I)
- Q(b);::QAR1(I)
- B(c);P_PINP(G)::QAR1(I)
- B(g);::QAR1(I)
- S(e);::R1(E)
- S(e);S_CUTQ(b)::P(C)
- Refutation
- S(e);
- Try
- S(F);
- Threat
- QAR1(I)
- Vars
- S(e);XS(F)::R1(E)
- S(e);S_CUTQ(b)::P(C)
- S(e);::R1(E)
- Refutation
- S(e);
- Try
- S(F);
- Threat
- QAR1(I)
- Vars
- S(e);CHECK,OGATE,XP(H)::B(K),XS(e)
- S(e);N_GUARD,S_CUTB(g)::R(D)
- S(e);::R1(E)
- Refutation
- S(e);
- Try
- S(F);XB(g)
- Threat
- DUALS(2)
- Vars
- S(e);CHECK,OGATE,XP(H)::B(K),XS(e)
- R(f);XR(E)::QAR1(I)
- P(h);XS(F)::QAR1(I)
- S(e);N_GUARD::R(D)
- S(e);S_CUTQ(b)::P(C)
- Refutation
- R(f);CHECK,XS(F)
- Try
- S(F);
- Threat
- QAR1(I)
- Vars
- S(e);XS(F)::R1(E)
- S(e);N_GUARD,S_CUTB(g)::R(D)
- S(e);::R1(E)
- S(e);S_CUTQ(b)::P(C)
- Refutation
- S(e);CHECK,XP(H)
- Try
- B(K);CHECK,XP(i)
- Refutation
- R(j);CHECK,XB(K)
- Try
- R(D);CHECK
- Refutation
- B(g);XR(D)
- Try
- Actual
- S(F);
- Threat
- QAR1(I)
- Vars
- S(e);CHECK,OGATE,XP(H)::B(K),XS(e)
- S(e);N_GUARD,S_CUTB(g)::R(D)
- S(e);::R1(E)
- S(e);S_CUTQ(b)::P(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).