MESON Chess Problem Database
Problem Display
PID: 64340 (2n3B1/1rQ2p1K/N3r2p/1pNkn2R/1B6/2RpPP2/2qp4/8 w - - 0 1)
Fenner, A Jack
Chess, 1947
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Rxa6
- 2.Rxe5#
- 1...Reb6
- 2.Rxe5#
- 1...Rc6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rf6
- 2.Rxe5#
- 1...Rg6
- 2.Rxe5#
- 1...f5
- 2.Bxe6#
- 1...f6
- 2.Bxe6#
- 1...Rxa6
- Tries
- 1.Se4?
- threat
- 2.Qc5#
- 1...Qxc3
- 2.Sxc3#
- 1...Rxa6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rxc7
- 2.Sxc7#
- 1...Reb6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rc6
- 2.Rxe5#
- 2.Qxe5#
- 2.Qxc6#
- 1...Rf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rg6
- 2.Rxe5#
- 2.Qxe5#
- 1...Re7
- 2.Qc6#
- 1...Re8
- 2.Qc6#
- 1...f5
- 2.Sf6#
- 1...f6
- 2.Sxf6#
- 2.Qxb7#
- 1...Rd6!
- threat
- 1.Sxe6?
- threat
- 2.Sf4#
- 2.Rxe5#
- 2.Qxe5#
- 2.Qc6#
- 1...Qxc3
- 2.Sf4#
- 1...Rxc7
- 2.Saxc7#
- 2.Sf4#
- 2.Sexc7#
- 1...fxe6
- 2.Rxe5#
- 2.Qxb7#
- 1...f5
- 2.Sf4#
- 1...Rb6
- 2.Sf4#
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd6
- 2.Sf4#
- 2.Qxd6#
- 1...Sa7
- 2.Sf4#
- 2.Rxe5#
- 2.Qxe5#
- 2.Qd6#
- 1...Se7
- 2.Sf4#
- 2.Rxe5#
- 2.Qxe5#
- 2.Qd6#
- 1...f6
- 2.Sd4#
- 2.Sf4#
- 2.Sec5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Qxb7#
- 2.e4#
- 1...Kxe6!
- threat
- 1.Sd7?
- threat
- 2.Qc5#
- 1...Rxa6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rxc7
- 2.Sxc7#
- 1...Reb6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rc6
- 2.Rxe5#
- 2.Qxe5#
- 2.Qxc6#
- 1...Rd6
- 2.Rxe5#
- 1...Rf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rg6
- 2.Rxe5#
- 2.Qxe5#
- 1...Re7
- 2.Qc6#
- 1...Re8
- 2.Qc6#
- 1...Qxc3!
- threat
- 1.Bxf7?
- threat
- 2.Bxe6#
- 2.Rxe5#
- 1...Qxc3
- 2.Bxe6#
- 1...Rb6
- 2.Rxe5#
- 1...Sd6
- 2.Bxe6#
- 1...Rxc7!
- threat
- 1.Qxb7+?
- 1...Kd6
- 2.Sb3#
- 2.Sxd3#
- 2.Sa4#
- 2.Se4#
- 2.Sd7#
- 1...Rc6!
- 1...Kd6
- 1.Se4?
- Keys
- 1.Sxd3!
- threat
- 2.Qc5#
- 1...Qxd3+
- 2.Rxd3#
- 1...Qxc3
- 2.Sf4#
- 1...Rxa6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rxc7
- 2.Sxc7#
- 1...Reb6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rc6
- 2.Rxe5#
- 2.Qxe5#
- 2.Qxc6#
- 1...Rd6
- 2.Rxe5#
- 1...Rf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rg6
- 2.Sf4#
- 2.Rxe5#
- 2.Qxe5#
- 1...Re7
- 2.Qc6#
- 1...Re8
- 2.Qc6#
- 1...f5
- 2.Sf4#
- 1...f6
- 2.Qxb7#
- threat
- 1.Sxd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 4
- Sets
- R(g);N_GUARD,P_SPINP(j),XS(G)::R1(F),XS(f)
- R(g);N_GUARD,P_SPINP(j)::R1(F),XS(f)
- P(j);N_SPINS(f),OGATE,P_PINQ(H),P_SPINR(g)::B(J),XR(g)
- P(j);OGATE,P_PINQ(H),P_SPINR(g)::B(J),XR(g)
- Tries
- Try
- S(E);
- Threat
- QAR1(H)
- Vars
- Q(a);XR(A)::S(E),XQ(a)
- R(i);XQ(H)::S(G),XR(i)
- R(g);N_GUARD,P_SPINP(j)::QAB1(H)
- P(j);N_SPINS(f),P_PINQ(H),P_SPINR(g)::S(E)
- Refutation
- R(g);P_SPINP(j)
- Try
- S(E);XR(g)
- Threat
- DUALS(4)
- Vars
- Q(a);XR(A)::S(E)
- P(j);N_SPINS(f),P_PINQ(H)::B(J)+S(E),DCHECK
- Refutation
- K(e);N_SPINS(f),P_SPINP(j),S_FLIGHT,XS(E)
- Try
- S(E);
- Threat
- QAR1(H)
- Vars
- R(i);XQ(H)::S(G),XR(i)
- R(g);N_GUARD,P_SPINP(j)::R1(F),XS(f)
- R(g);N_GUARD,P_SPINP(j)::QAB1(H)
- Refutation
- Q(a);XR(A)
- Try
- B(J);P_PINR(g),XP(j)
- Threat
- DUALS(2)
- Vars
- Q(a);XR(A)::B(J),XR(g)
- R(i);::R1(F),XS(f)
- S(k);::B(J),XR(g)
- Refutation
- R(i);P_PINB(J),XQ(H)
- Try
- Q(H);CHECK,XR(i)
- Refutation
- R(g);P_SPINP(j),P_SPINR(g)
- Try
- Actual
- S(E);P_SPINS(E),XP(c)
- Threat
- QAR1(H)
- Vars
- Q(a);CHECK,OGATE,XS(E)::R(A),XQ(a)
- Q(a);N_PINS(E),XR(A)::S(E)
- R(i);XQ(H)::S(G),XR(i)
- R(g);N_GUARD,P_SPINP(j)::R1(F),XS(f)
- R(g);N_GUARD,P_SPINP(j)::QAB1(H)
- P(j);N_PINS(E),N_SPINS(f),P_PINQ(H),P_SPINR(g)::S(E)
- P(j);P_PINQ(H),P_SPINR(g)::QAB(H),XR(i)
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).