MESON Chess Problem Database
Problem Display
PID: 76910 (8/8/4pK1p/5b1k/6Nr/5B2/4RQ2/8 w - - 0 1)
Hasenzahl, Karl
Schweizerische Arbeiter Schachzeitung, 1956
#2
5 + 5
SOLUTION
- SOUND
- Sets
- 1...Rh2
- 2.Qxh2#
- 1...Rxg4
- 2.Qh2#
- 1...Bxg4
- 2.Re5#
- 1...Rh2
- Tries
- 1.Sh2+?
- 1...Bg4
- 2.Re5#
- 1...Rg4!
- 1...Bg4
- 1.Se3+?
- 1...Rg4
- 2.Qh2#
- 1...Bg4!
- 1...Rg4
- 1.Se5+?
- 1...Rg4
- 2.Qh2#
- 1...Bg4!
- 1...Rg4
- 1.Sxh6+?
- 1...Kxh6
- 2.Qxh4#
- 1...Rg4
- 2.Qh2#
- 1...Bg4!
- 1...Kxh6
- 1.Re5?
- 1...Rxg4
- 2.Qh2#
- 1...Rh1
- 2.Sh2#
- 2.Se3#
- 1...Rh2
- 2.Sxh2#
- 2.Se3#
- 2.Qxh2#
- 1...Rh3!
- 1...Rxg4
- 1.Sh2+?
- Keys
- 1.Qe3!
- threat
- 2.Qxh6#
- 1...Rxg4
- 2.Rh2#
- 1...Bxg4
- 2.Qe5#
- threat
- 1.Qe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB,P_SPINR(a),XS(D)::QAR(B)
- B(b);OGATEB,P_SPINB(b),XS(D)::R(A)
- Tries
- Try
- S(D);CHECK
- Vars
- B(b);P_SPINB(b),S_CUTR(a)::R(A)
- Refutation
- R(a);P_SPINR(a)
- Try
- S(D);CHECK
- Vars
- R(a);P_SPINR(a),S_CUTB(b)::QAR(B)
- Refutation
- B(b);P_SPINB(b)
- Try
- S(D);CHECK
- Vars
- R(a);P_SPINR(a),S_CUTB(b)::QAR(B)
- Refutation
- B(b);P_SPINB(b)
- Try
- S(D);CHECK,XP(e)
- Vars
- K(c);P-FLIGHT,XS(D)::QAR2(B),XR(a)
- R(a);P_SPINR(a),S_CUTB(b)::QAR(B)
- Refutation
- B(b);P_SPINB(b)
- Try
- R(A);P_PINB(b)
- Vars
- R(a);OGATEB,P_SPINR(a),XS(D)::QAR(B)
- Refutation
- R(a);
- Try
- Actual
- Q(B);
- Threat
- QAR1(B),XP(e)
- Vars
- R(a);OGATEB,P_SPINR(a),XS(D)::R(A)
- B(b);OGATEB,P_SPINB(b),XS(D)::QAR(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).