MESON Chess Problem Database
Problem Display
PID: 247374 (2N2Q2/1Bb3B1/2N1pn2/3k4/4rR2/1P2R3/6K1/1b6 w - - 0 1)
Simonet, Andre
Stella Polaris, 1967
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Rxe3
- 2.Rd4#
- 1...Ra4
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Rb4
- 2.Sxb4#
- 1...Rc4
- 2.Sb4#
- 2.bxc4#
- 1...Rd4
- 2.Sb4#
- 2.Sxd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Rxd4#
- 1...Re5
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Sxe5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Rd4#
- 1...Bxf4
- 2.Sb6#
- 1...Ba5
- 2.Qd6#
- 1...Be5
- 2.Sb6#
- 1...Bb6
- 2.Sxb6#
- 2.Qd6#
- 1...Bd6
- 2.Qxd6#
- 1...Bb8
- 2.Sb6#
- 1...Bd8
- 2.Qd6#
- 1...Sg4
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Sh5
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Sd7
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Sh7
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Se8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Sg8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Rxe3
- Tries
- 1.Sb4+?
- 1...Ke5
- 2.Qxf6#
- 1...Kd4!
- 1...Ke5
- 1.Sd4+?
- 1...Ke5
- 2.Qxf6#
- 1...Kxd4!
- 1...Ke5
- 1.Sa5+?
- 1...Ke5
- 2.Qxf6#
- 1...Kd4!
- 1...Ke5
- 1.Se5+?
- 1...Kxe5
- 2.Qxf6#
- 1...Kd4!
- 1...Kxe5
- 1.S6a7+?
- 1...Ke5
- 2.Qxf6#
- 1...Kd4!
- 1...Ke5
- 1.Sb8+?
- 1...Ke5
- 2.Qxf6#
- 1...Kd4!
- 1...Ke5
- 1.Sd8+?
- 1...Ke5
- 2.Qxf6#
- 1...Kd4!
- 1...Ke5
- 1.Bxf6?
- threat
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Bd6
- 2.Qxd6#
- 1...Rb4
- 2.Sxb4#
- 1...Rc4
- 2.Sb4#
- 2.bxc4#
- 1...Rd4
- 2.Sb4#
- 2.Sxd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Rxd4#
- 1...Ba5
- 2.Sb4#
- 2.Sd4#
- 2.Sxa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd6#
- 1...Be5
- 2.Sb6#
- 1...Bb8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sxb8#
- 2.Sd8#
- 2.Sb6#
- 1...Bd8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sxd8#
- 2.Qd6#
- 1...e5!
- threat
- 1.Rd3+?
- 1...Rd4
- 2.Rdxd4#
- 2.Rfxd4#
- 1...Bxd3!
- 1...Rd4
- 1.Rexe4?
- threat
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Rd4#
- 1...Sxe4
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Bd6
- 2.Qxd6#
- 1...e5
- 2.Sd4#
- 2.Sd8#
- 1...Ba5
- 2.Sb4#
- 2.Sd4#
- 2.Sxa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Rd4#
- 2.Re5#
- 2.Qd6#
- 1...Be5
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Sxe5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Sb6#
- 2.Rxe5#
- 1...Bb6
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Sxb6#
- 2.Re5#
- 2.Qd6#
- 1...Bb8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sxb8#
- 2.Sd8#
- 2.Sb6#
- 2.Rd4#
- 1...Bd8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sxd8#
- 2.Rd4#
- 2.Re5#
- 2.Qd6#
- 1...Bxe4+!
- threat
- 1.Rfxe4?
- threat
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Rd4#
- 1...Sxe4
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 1...Bd6
- 2.Qxd6#
- 1...e5
- 2.Sd4#
- 2.Sd8#
- 1...Ba5
- 2.Sb4#
- 2.Sd4#
- 2.Sxa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Rd4#
- 2.Re5#
- 2.Qd6#
- 1...Be5
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Sxe5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Sb6#
- 2.Rxe5#
- 1...Bb6
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sd8#
- 2.Sxb6#
- 2.Re5#
- 2.Qd6#
- 1...Bb8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sxb8#
- 2.Sd8#
- 2.Sb6#
- 2.Rd4#
- 1...Bd8
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.Sb8#
- 2.Sxd8#
- 2.Rd4#
- 2.Re5#
- 2.Qd6#
- 1...Bxe4+!
- threat
- 1.Qb4?
- threat
- 2.S8e7#
- 2.Qb5#
- 1...e5
- 2.Sd4#
- 2.Sd8#
- 1...Rc4
- 2.S6e7#
- 2.S8e7#
- 2.Qxc4#
- 2.bxc4#
- 1...Bd3
- 2.S8e7#
- 1...Bb6
- 2.Sxb6#
- 2.S8e7#
- 2.Qd6#
- 1...Bd6
- 2.Sb6#
- 2.Qxd6#
- 1...Bd8
- 2.Qd6#
- 2.Qb5#
- 1...Sd7
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.S6e7#
- 2.Sb8#
- 2.Sd8#
- 2.S8e7#
- 1...Sg8
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.S6a7#
- 2.S6e7#
- 2.Sb8#
- 2.Sd8#
- 2.Qb5#
- 1...Rxb4!
- threat
- 1.Sb4+?
- Keys
- 1.b4!
- threat
- 2.Qc5#
- 1...Kc4
- 2.Qc5#
- 1...Rxb4
- 2.Sxb4#
- 1...e5
- 2.Qf7#
- 1...Rc4
- 2.S6e7#
- 1...Bb6
- 2.Sxb6#
- 1...Bd6
- 2.Sb6#
- 1...Sd7
- 2.Sa5#
- threat
- 1.b4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 6
- Sets
- R(b);OGATE,XR(C)::R1(D)
- R(b);::B(F)+S(E),DCHECK,XR(b)
- B(f);N_GUARD,XR(D)::S(H)
- B(f);N_GUARD::QAR1(I)
- B(f);N_GUARD::S(H)
- B(f);N_GUARD::QAR1(I),XB(f)
- Tries
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)::QAB1(I),XS(e)
- Refutation
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)::QAB1(I),XS(e)
- Refutation
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e),XS(E)
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)::QAB1(I),XS(e)
- Refutation
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e),XS(E)::QAB1(I),XS(e)
- Refutation
- K(c);P-FLIGHT,P_SPINR(b)
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)::QAB1(I),XS(e)
- Refutation
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)::QAB1(I),XS(e)
- Refutation
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)::QAB1(I),XS(e)
- Refutation
- K(c);P-FLIGHT,P_SPINR(b),P_SPINS(e)
- Try
- B(G);XS(e)
- Threat
- DUALS(6)
- Vars
- B(f);N_GUARD::QAR1(I),XB(f)
- R(b);::B(F)+S(E),DCHECK,XR(b)
- B(f);N_GUARD::S(H)
- Refutation
- P(d);
- Try
- R(C);CHECK
- Refutation
- B(a);XR(C)
- Try
- R(C);XR(b)
- Threat
- DUALS(8)
- Vars
- B(f);N_GUARD::QAR1(I),XB(f)
- Refutation
- B(a);CHECK,XR(C)
- Try
- R(D);XR(b)
- Threat
- DUALS(8)
- Vars
- B(f);N_GUARD::QAR1(I),XB(f)
- Refutation
- B(a);CHECK,XR(D)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- B(a);::S(H)
- Refutation
- R(b);XQ(I)
- Try
- Actual
- P(B);
- Threat
- QAR1(I)
- Vars
- K(c);P_SPINR(b),S_FLIGHT::QAR1(I)
- R(b);XP(B)::B(F)+S(E),DCHECK,XR(b)
- P(d);OGATEB::QAB(I)
- R(b);::B(F)+S(E),DCHECK
- B(f);N_GUARD::S(H),XB(f)
- B(f);N_GUARD::S(H)
- S(e);::B(F)+S(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).