MESON Chess Problem Database
Problem Display
PID: 262520 (Q7/8/5pn1/1B3p2/5Pk1/4P1PR/6RK/3b4 w - - 0 1)
Hjelle, David
Europe Echecs, 1965
#2
8 + 5
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bc2
- Tries
- 1.Bf1?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Bd3?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Bc4?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Ba6?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Bc6?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bf3
- 2.Bxf3#
- 1...Bc2
- 2.Bf3#
- 1...Bb3
- 2.Bf3#
- 1...Ba4
- 2.Bf3#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Be2!
- 1...Sxf4
- 1.Rg1?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Rf2?
- 1...Sh4
- 2.Rxh4#
- 1...Bf3
- 2.Qxf3#
- 1...Bc2
- 2.Be2#
- 2.Qf3#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 2.Qf3#
- 1...Ba4
- 2.Be2#
- 2.Qf3#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Sxf4!
- 1...Sh4
- 1.Rh6?
- 1...Sxf4
- 2.gxf4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Sh4
- 2.Rxh4#
- 2.gxh4#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Rh7?
- 1...Sxf4
- 2.gxf4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Sh4
- 2.Rxh4#
- 2.gxh4#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Qd5?
- threat
- 2.Qxd1#
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Bf3!
- threat
- 1.Qc6?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Qb7?
- 1...Sxf4
- 2.gxf4#
- 1...Sh4
- 2.Rxh4#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Bf3!
- 1...Sxf4
- 1.Qg8?
- 1...Bf3
- 2.Rh4#
- 2.Qxg6#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Kf3!
- 1...Bf3
- 1.Bf1?
- Keys
- 1.Qe8!
- 1...Kf3
- 2.g4#
- 1...Sxf4
- 2.gxf4#
- 1...Bf3
- 2.Qxg6#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bb3
- 2.Be2#
- 1...Ba4
- 2.Be2#
- 1...Sh4
- 2.gxh4#
- 1...Se5
- 2.Qh5#
- 1...Se7
- 2.Qh5#
- 1...Sf8
- 2.Qh5#
- 1...Sh8
- 2.Qh5#
- 1...Kf3
- 1.Qe8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::R1(E)
- Tries
- Try
- B(G);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- B(G);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- B(G);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- B(G);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- B(G);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G),XB(a)
- B(a);N_GUARD::B(G)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- R(A);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- R(A);
- Vars
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::QAB1(H),XB(a)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- S(e);XP(F)
- Try
- R(E);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- R(E);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- Q(H);
- Threat
- QAB(H),XB(a)
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- Q(H);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- Q(H);
- Vars
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- S(e);N_GUARD::R1(E),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);N_GUARD::R1(E)
- Refutation
- B(a);
- Try
- Q(H);P_PINS(e)
- Vars
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- Refutation
- K(b);N_SPINS(e),S_FLIGHT
- Try
- Actual
- Q(H);
- Vars
- K(b);OGATE,S_FLIGHT::R(E)+P(D)
- S(e);OGATE,XP(F)::R(A)+P(D),XS(e)
- B(a);SBLOCK::QAR2(H),XS(e)
- B(a);N_GUARD::B(G)
- B(a);N_GUARD::B(G),XB(a)
- S(e);OGATE::R(A)+P(D),XS(e)
- S(e);OGATE::QAB1(H)
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).