MESON Chess Problem Database
Problem Display
PID: 139452 (7B/8/2bb2N1/RB3kNK/2p3pp/2n5/2RrP3/rQ6 w - - 0 1)
Witt, Andreas
Troll, 2010
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Bh1
- 2.Bd7#
- 1...Bg2
- 2.Bd7#
- 1...Bf3
- 2.Bd7#
- 1...Be4
- 2.Bd7#
- 1...Bd5
- 2.Bd7#
- 1...Bb7
- 2.Bd7#
- 1...Bd7
- 2.Bxd7#
- 1...Ba8
- 2.Bd7#
- 1...Be8
- 2.Bd7#
- 1...Bf4
- 2.Sxh4#
- 2.Se7#
- 1...Sd5
- 2.e4#
- 1...Bh1
- Tries
- 1.Bxc6+?
- 1...Rxa5
- 2.Bd7#
- 1...Rd5
- 2.Bd7#
- 1...Be5
- 2.Rxe5#
- 1...Sb5
- 2.Be4#
- 2.Bd7#
- 2.e4#
- 1...Sd5
- 2.Bd7#
- 2.e4#
- 1...Bc5!
- 1...Rxa5
- 1.Qf1+?
- 1...Bf3
- 2.Bd7#
- 1...Bf4
- 2.Sxh4#
- 2.Se7#
- 2.Qxf4#
- 1...Rxf1!
- 1...Bf3
- 1.e4+?
- 1...Bxe4
- 2.Bd7#
- 1...Sxe4!
- 1...Bxe4
- 1.Bxc6+?
- Keys
- 1.e3!
- threat
- 2.Sxh4#
- 1...Rh2
- 2.Rf2#
- 1...Be8
- 2.Bd7#
- 1...Bg3
- 2.Se7#
- 1...h3
- 2.Sh4#
- threat
- 1.e3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- B(h);OGATE::R(D)+B(E),DCHECK
- B(h);OGATE::B(E)
- B(h);OGATE::R(D)+B(E),DCHECK,XB(h)
- B(h);OGATE,P_PINS(H)::R(D)+B(E),DCHECK
- S(c);N_GUARD,S_CUTB(h)::P(C)
- Tries
- Try
- B(E);CHECK,XB(h)
- Vars
- R(a);XR(D)::B(E)
- R(b);P_SPINR(b)::B(E)
- B(i);N_GUARD,P_SPINB(i)::R1(D),XB(i)
- Refutation
- B(i);P_SPINB(i)
- Try
- Q(A);CHECK
- Vars
- B(h);OGATE,P_SPINB(h)::R(D)+B(E),DCHECK
- Refutation
- R(a);XQ(A)
- Try
- P(C);CHECK
- Vars
- B(h);OGATE,XP(C)::R(D)+B(E),DCHECK
- Refutation
- S(c);XP(C)
- Try
- Actual
- P(C);
- Threat
- S(H),XP(f)
- Vars
- R(b);OGATE::QAB(A)+R(B),DCHECK
- B(h);OGATE,P_PINS(H)::R(D)+B(E),DCHECK
- B(i);N_GUARD::S(H)
- P(f);::S(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).