MESON Chess Problem Database
Problem Display
PID: 270782 (1BB2R2/4N2p/R2P2p1/1Qbbk1P1/K3pn2/pn2PP2/3N4/1q1r4 w - - 0 1)
Forster, Klaus
The Problemist, 2023
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Bxe3
- 2.Sc6#
- 1...Bb4
- 2.Sc4#
- 2.Sc6#
- 1...Bd4
- 2.Sc4#
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Bb6
- 2.Sc4#
- 2.Sc6#
- 1...Bxd6
- 2.Sc4#
- 2.Sc6#
- 2.Bxd6#
- 1...Ba7
- 2.Sc4#
- 2.Sc6#
- 1...Bc4
- 2.Sxc4#
- 2.d7#
- 1...Bc6
- 2.Sc4#
- 1...Be6
- 2.d7#
- 1...Bb7
- 2.Sc4#
- 2.d7#
- 1...Bf7
- 2.d7#
- 1...Ba8
- 2.Sc4#
- 2.d7#
- 1...Bg8
- 2.d7#
- 1...Sd4
- 2.exf4#
- 1...Bxe3
- Tries
- 1.Sxg6+?
- 1...Sxg6
- 2.Rf5#
- 1...hxg6!
- 1...Sxg6
- 1.Re8?
- threat
- 2.Sc6#
- 2.Sxg6#
- 1...Bxe3
- 2.Sc6#
- 1...Bc4
- 2.Sxc4#
- 2.d7#
- 1...Bc6
- 2.Sc4#
- 1...Be6
- 2.d7#
- 1...Bb7
- 2.Sc4#
- 2.d7#
- 1...Bf7
- 2.d7#
- 1...Ba8
- 2.Sc4#
- 2.d7#
- 1...Bg8
- 2.d7#
- 1...Se6!
- threat
- 1.Qxc5?
- threat
- 2.Sc4#
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Rxd2
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Sxd2
- 2.Sc6#
- 2.Qd4#
- 2.Qc3#
- 2.exf4#
- 1...exf3
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Qc2
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Qd3
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Qc1
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Rc1
- 2.Sc6#
- 2.exf4#
- 2.d7#
- 1...Sa1
- 2.Sc4#
- 2.Sc6#
- 2.Qd4#
- 2.Qc3#
- 2.exf4#
- 1...Sc1
- 2.Sc4#
- 2.Sc6#
- 2.Qd4#
- 2.Qc3#
- 2.exf4#
- 1...Sd4
- 2.Sc4#
- 2.Qxd4#
- 2.exd4#
- 2.exf4#
- 1...Sa5
- 2.Qd4#
- 2.Qc3#
- 2.exf4#
- 1...Se2
- 2.Sc4#
- 2.Sc6#
- 2.Qxd5#
- 2.d7#
- 1...Sg2
- 2.Sc4#
- 2.Sc6#
- 2.Qxd5#
- 2.d7#
- 1...Sd3
- 2.Sc4#
- 2.Sc6#
- 2.Qxd5#
- 2.d7#
- 1...Sh3
- 2.Sc4#
- 2.Sc6#
- 2.Qxd5#
- 2.d7#
- 1...Sh5
- 2.Sc4#
- 2.Sc6#
- 2.Qxd5#
- 2.d7#
- 1...Se6
- 2.Sc4#
- 2.Sc6#
- 2.Qxd5#
- 1...Sxc5+!
- threat
- 1.Sxg6+?
- Keys
- 1.Qc4!
- threat
- 2.exf4#
- 1...Bc6+
- 2.Sxc6#
- 1...Bxe3
- 2.d7#
- 1...Bxc4
- 2.Sxc4#
- 1...Bf7
- 2.Sc6#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Se6
- 2.Qxd5#
- threat
- 1.Qc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 7
- REMOVED MATES = 3
- Sets
- B(g);P_SPINB(h),XP(B)::S(I)
- B(h);N_GUARD,P_PINQ(E),P_SPINB(g)::S(A)
- B(h);P_SPINB(g)::B(J)+P(H)
- S(d);SBLOCK::P(B),XS(f)
- Tries
- Try
- S(I);CHECK,XP(j)
- Vars
- S(f);XS(I)::R1(L)
- Refutation
- P(k);XS(I)
- Try
- R(L);
- Threat
- DUALS(2)
- Vars
- B(g);P_SPINB(h),XP(B)::R(L)+S(I),DCHECK
- B(h);N_GUARD,P_PINQ(E),P_SPINB(g)::S(A)
- B(h);P_SPINB(g)::B(J)+P(H)
- Refutation
- S(f);
- Try
- Q(E);P_PINB(h),XB(g)
- Threat
- DUALS(4)
- Refutation
- S(d);CHECK,N_SPINB(h),XQ(E)
- Try
- Actual
- Q(E);
- Threat
- P(B),XS(f)
- Vars
- B(h);CHECK,N_GUARD::S(I),XB(h)
- B(g);N_GUARD,XP(B)::B(J)+P(H)
- B(h);XQ(E)::S(A),XB(h)
- B(h);N_GUARD::S(I)
- S(f);N_GUARD::QAR1(E),XB(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).