MESON Chess Problem Database
Problem Display
PID: 22107 (8/BQ1K1p2/B6p/3R1P2/4kN1p/2b1NR2/1nrr2P1/1q3n2 w - - 0 1)
Larsen, Karl Adolf Koefoed
2nd Place, L'Alfiere di Re, 1924
#2
10 + 10
| 5454 | Near Snap | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Re2
- 2.Ra5#
- 2.Rb5#
- 1...Rf2
- 2.Ra5#
- 2.Rb5#
- 1...Rxg2
- 2.Ra5#
- 2.Rb5#
- 1...Rxd5+
- 2.Qxd5#
- 1...Bd4
- 2.Rc5#
- 1...Be5
- 2.Rd4#
- 1...Sd3
- 2.Rb5#
- 1...Re2
- Tries
- 1.Se2?
- threat
- 2.Rf4#
- 1...Rxd5+
- 2.Qxd5#
- 1...Rxe2
- 2.Ra5#
- 1...Bd4
- 2.Rc5#
- 1...Be5
- 2.Rd4#
- 1...Sd3
- 2.Rb5#
- 1...Rd4!
- threat
- 1.Sd3?
- threat
- 2.Sc5#
- 2.Rf4#
- 2.Rd4#
- 2.Ra5#
- 2.Re5#
- 2.Rd6#
- 1...Rxg2
- 2.Rf4#
- 2.Rd4#
- 2.Ra5#
- 2.Re5#
- 2.Rd6#
- 1...Sxe3
- 2.Sc5#
- 2.Rxe3#
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Sxd3
- 2.Rb5#
- 1...Qa2
- 2.Sc5#
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Rf2
- 2.Sc5#
- 2.Rd4#
- 2.Ra5#
- 2.Re5#
- 2.Rd6#
- 1...Bb4
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Bd4
- 2.Rxd4#
- 2.Rc5#
- 2.Re5#
- 1...Ba5
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Be5
- 2.Rd4#
- 2.Rxe5#
- 1...Bf6
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Bg7
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Bh8
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Sd1
- 2.Sc5#
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Sa4
- 2.Rf4#
- 2.Rd4#
- 2.Re5#
- 1...Sc4
- 2.Sc5#
- 2.Rf4#
- 2.Rd4#
- 1...Rxd3!
- threat
- 1.Sh3?
- threat
- 2.Rf4#
- 1...Rxd5+
- 2.Qxd5#
- 1...Rf2
- 2.Ra5#
- 1...Bd4
- 2.Rc5#
- 1...Be5
- 2.Rd4#
- 1...Sd3
- 2.Rb5#
- 1...Rd4!
- threat
- 1.Se6?
- threat
- 2.Sc5#
- 2.Rf4#
- 1...Rxd5+
- 2.Qxd5#
- 1...Rxg2
- 2.Rf4#
- 2.Ra5#
- 2.Rc5#
- 1...Rf2
- 2.Sc5#
- 2.Ra5#
- 2.Rc5#
- 1...Rd4
- 2.Sc5#
- 1...Bb4
- 2.Rf4#
- 1...Bd4
- 2.Rc5#
- 1...Ba5
- 2.Rf4#
- 1...Be5
- 2.Rd4#
- 1...Bf6
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Sd3
- 2.Rb5#
- 1...Sa4
- 2.Rf4#
- 1...fxe6!
- threat
- 1.Sg6?
- threat
- 2.Rf4#
- 2.Rxd2#
- 2.Rd3#
- 2.Rd4#
- 1...Rxd5+
- 2.Qxd5#
- 1...Rxg2
- 2.Rf4#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Ra5#
- 2.Re5#
- 2.Rd6#
- 1...Sxe3
- 2.Rxe3#
- 2.Rf4#
- 2.Rd4#
- 1...Qa2
- 2.Rf4#
- 2.Rd4#
- 1...Rd1
- 2.Rf4#
- 2.Rxd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 1...Re2
- 2.Rf4#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Ra5#
- 2.Re5#
- 2.Rd6#
- 1...Rf2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Ra5#
- 2.Re5#
- 2.Rd6#
- 1...Rd3
- 2.Rf4#
- 2.Rxd3#
- 2.Rd4#
- 1...Rd4
- 2.Rxd4#
- 1...Bb4
- 2.Rf4#
- 2.Rd4#
- 1...Bd4
- 2.Rxd4#
- 2.Rc5#
- 2.Re5#
- 1...Ba5
- 2.Rf4#
- 2.Rd4#
- 1...Be5
- 2.Rd4#
- 1...Bf6
- 2.Rf4#
- 2.Rd4#
- 1...Bg7
- 2.Rf4#
- 2.Rd4#
- 1...Bh8
- 2.Rf4#
- 2.Rd4#
- 1...Sd1
- 2.Rf4#
- 2.Rd4#
- 1...Sd3
- 2.Rd4#
- 2.Rb5#
- 2.Re5#
- 1...Sa4
- 2.Rf4#
- 2.Rd4#
- 1...Sc4
- 2.Rf4#
- 2.Rd4#
- 1...fxg6!
- threat
- 1.Bd3+?
- 1...Sxd3
- 2.Rb5#
- 1...Rxd3!
- 1...Sxd3
- 1.Rd6+?
- 1...Rd5
- 2.Qxd5#
- 1...Ke5!
- 1...Rd5
- 1.Se2?
- Keys
- 1.Sh5!
- threat
- 2.Rf4#
- 1...Rxd5+
- 2.Qxd5#
- 1...Rf2
- 2.Ra5#
- 1...Rd4
- 2.Sf6#
- 1...Bd4
- 2.Rc5#
- 1...Be5
- 2.Rd4#
- 1...Sd3
- 2.Rb5#
- threat
- 1.Sh5!
This anticipates 239463(1939)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(e);CHECK,OGATE,P_SPINR(e),XR(E)::QAB1(I),XR(e)
- B(f);N_PINR(E),SBLOCK::QAB(I)+R(E)
- B(f);SBLOCK::QAB(I)+R(E),DCHECK
- S(c);N_PINR(E)::QAB(I)+R(E)
- Tries
- Try
- S(D);
- Threat
- R1(C)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XR(E)::QAB1(I),XR(e)
- R(e);N_PINR(E),XS(D)::QAB(I)+R(E)
- B(f);N_PINR(E)::QAB(I)+R(E)
- B(f);SBLOCK::QAB(I)+R(E),DCHECK
- S(c);N_PINR(E),SBLOCK::QAB(I)+R(E)
- Refutation
- R(e);
- Try
- S(D);N_SPINR(E)
- Threat
- DUALS(6)
- Vars
- S(c);SBLOCK,XS(D)::QAB(I)+R(E)
- Refutation
- R(e);P_PINR(E),XS(D)
- Try
- S(D);
- Threat
- R1(C)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XR(E)::QAB1(I),XR(e)
- R(e);N_PINR(E)::QAB(I)+R(E)
- B(f);N_PINR(E),SBLOCK::QAB(I)+R(E)
- B(f);SBLOCK::QAB(I)+R(E),DCHECK
- S(c);N_PINR(E),SBLOCK::QAB(I)+R(E)
- Refutation
- R(e);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XR(E)::QAB1(I),XR(e)
- R(e);::S(D)
- B(f);::R1(C)
- B(f);N_PINR(E)::QAB(I)+R(E)
- B(f);SBLOCK::QAB(I)+R(E),DCHECK
- S(c);N_PINR(E),SBLOCK::QAB(I)+R(E)
- S(c);::R1(C)
- Refutation
- P(j);XS(D)
- Try
- S(D);
- Threat
- DUALS(4)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XR(E)::QAB1(I),XR(e)
- R(e);::QAB(I)+R(E),DCHECK,XR(e)
- B(f);::QAB(I)+R(E),DCHECK
- Refutation
- P(j);XS(D)
- Try
- B(G);CHECK,N_SPINR(E)
- Vars
- S(c);XB(G)::QAB(I)+R(E)
- Refutation
- R(e);P_PINR(E),XB(G)
- Try
- R(E);CHECK
- Vars
- R(e);N_GUARD,P_SPINR(e)::QAB1(I),XR(e)
- Refutation
- K(g);P-FLIGHT
- Try
- Actual
- S(D);
- Threat
- R1(C)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XR(E)::QAB1(I),XR(e)
- R(e);N_PINR(E)::QAB(I)+R(E)
- R(e);S_CUTB(f)::S(D)
- B(f);N_PINR(E),SBLOCK::QAB(I)+R(E)
- B(f);SBLOCK::QAB(I)+R(E),DCHECK
- S(c);N_PINR(E),SBLOCK::QAB(I)+R(E)
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).