MESON Chess Problem Database
Problem Display
PID: 24927 (2R2B2/r1q2P2/1Q6/pp2P3/1p2b2p/2k3rR/1N1N4/2K5 w - - 0 1)
Karlsson, Borje
Stockholms Tidningen, 1939
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qc5
- 2.Qxc5#
- 1...Rd3
- 2.Sd1#
- 1...Bd3
- 2.Sd1#
- 1...Bf3
- 2.Qe3#
- 1...Bc6
- 2.Qc5#
- 1...b3
- 2.Sxe4#
- 1...Qc5
- Tries
- 1.Bc5?
- threat
- 2.Bd4#
- 1...Qxc5
- 2.Qxc5#
- 1...b3
- 2.Sxe4#
- 1...Qxb6!
- threat
- 1.Bg7?
- threat
- 2.e6#
- 1...Bd3
- 2.Sd1#
- 1...Bf3
- 2.Qe3#
- 1...Bc6
- 2.Qc5#
- 1...b3!
- threat
- 1.Rxg3+?
- 1...Bd3
- 2.Sd1#
- 2.Rxd3#
- 1...Bf3
- 2.Rxf3#
- 2.Qe3#
- 1...hxg3!
- 1...Bd3
- 1.Rxc7+?
- 1...Bc6
- 2.Rxc6#
- 2.Qc5#
- 1...Rxc7!
- 1...Bc6
- 1.Qe3+?
- 1...Bd3
- 2.Sd1#
- 1...Rxe3!
- 1...Bd3
- 1.Bc5?
- Keys
- 1.e6!
- threat
- 2.Bg7#
- 1...Bc6
- 2.Qc5#
- 1...Bd3
- 2.Sd1#
- 1...Bf3
- 2.Qe3#
- 1...b3
- 2.Sxe4#
- threat
- 1.e6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- Q(i);N_GUARD::QAR2(F),XQ(i)
- R(b);::S(B)
- B(d);N_SPINR(b),SBLOCK::S(B)
- B(d);N_GUARD,N_SPINR(b),S_CUTR(b)::QAR2(F)
- B(d);N_SPINQ(i),S_CUTQ(i)::QAR2(F)
- P(c);SBLOCK::S(C),XB(d)
- Tries
- Try
- B(I);N_PINQ(i)
- Threat
- B(I)
- Vars
- Q(i);OGATE,P_SPINQ(i),XB(I)::QAR2(F),XQ(i)
- P(c);SBLOCK::S(C),XB(d)
- Refutation
- Q(i);XQ(F)
- Try
- B(I);
- Threat
- B(I)+P(E)
- Vars
- B(d);N_SPINR(b),SBLOCK::S(B)
- B(d);N_GUARD,N_SPINR(b),S_CUTR(b)::QAR2(F)
- B(d);N_SPINQ(i),S_CUTQ(i)::QAR2(F)
- Refutation
- P(c);
- Try
- R(D);CHECK,XR(b)
- Refutation
- P(e);XR(D)
- Try
- R(H);CHECK,XQ(i)
- Refutation
- R(h);XR(H)
- Try
- Q(F);CHECK,N_PINR(b)
- Vars
- B(d);P_SPINB(d)::S(B)
- Refutation
- R(b);P_SPINR(b),XQ(F)
- Try
- Actual
- P(E);
- Threat
- B(I)
- Vars
- B(d);N_SPINQ(i),S_CUTQ(i)::QAR2(F)
- B(d);N_SPINR(b),SBLOCK::S(B)
- B(d);N_GUARD,N_SPINR(b),S_CUTR(b)::QAR2(F)
- P(c);SBLOCK::S(C),XB(d)
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).