MESON Chess Problem Database
Problem Display
PID: 247922 (B2Rb2K/Q1p4P/R4pkN/p5Pp/r4p1P/3P4/4N3/b1q5 w - - 0 1)
Prins, Hendrik
The Problemist, 1990
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Be4#
- 1...Ra3
- 2.Be4#
- 1...Rd4
- 2.Rxf6#
- 1...Re4
- 2.Bxe4#
- 1...Bd4
- 2.Be4#
- 1...Bb5
- 2.Rg8#
- 1...Bc6
- 2.Rg8#
- 1...Bd7
- 2.Rg8#
- 1...c5
- 2.Qg7#
- 1...c6
- 2.Qg7#
- 1...Ra2
- Tries
- 1.Sd4?
- threat
- 2.Be4#
- 2.Rxf6#
- 1...Rxd4
- 2.Rxf6#
- 1...Bxd4
- 2.Be4#
- 1...Qe3
- 2.Rxf6#
- 1...Qe1
- 2.Rxf6#
- 1...Qh1
- 2.Rxf6#
- 1...Qc5
- 2.Rxf6#
- 1...Bc6
- 2.Rg8#
- 1...Bd7
- 2.Rxf6#
- 2.Rg8#
- 1...c6
- 2.Qg7#
- 1...Qc6!
- threat
- 1.Rd4?
- threat
- 2.Be4#
- 2.Rxf6#
- 1...Rxd4
- 2.Rxf6#
- 1...Bxd4
- 2.Be4#
- 1...Qe3
- 2.Rxf6#
- 1...Qh1
- 2.Sxf4#
- 2.Rxf6#
- 1...Qc5
- 2.Sxf4#
- 2.Rxf6#
- 1...Qc6
- 2.Sxf4#
- 1...Bd7
- 2.Rxf6#
- 1...c6
- 2.Qg7#
- 1...Bc6!
- threat
- 1.Qd4?
- threat
- 2.Be4#
- 2.Rxf6#
- 1...Rxd4
- 2.Rxf6#
- 1...Bxd4
- 2.Be4#
- 1...Qe3
- 2.Rxf6#
- 1...Qh1
- 2.Sxf4#
- 2.Rxf6#
- 1...Qc5
- 2.Sxf4#
- 2.Rxf6#
- 1...Qc6
- 2.Sxf4#
- 1...Bc6
- 2.Rg8#
- 1...Bd7
- 2.Rxf6#
- 2.Rg8#
- 1...c6!
- threat
- 1.Qxc7?
- threat
- 2.Qg7#
- 1...Bd7
- 2.Rg8#
- 1...Bf7
- 2.Qxf7#
- 1...Qxc7!
- threat
- 1.Sd4?
- Keys
- 1.d4!
- threat
- 2.Be4#
- 2.Rxf6#
- 1...Rxd4
- 2.Rxf6#
- 1...Bxd4
- 2.Be4#
- 1...Qe3
- 2.Rxf6#
- 1...Qb1
- 2.Sxf4#
- 2.Rxf6#
- 1...Qh1
- 2.Sxf4#
- 2.Rxf6#
- 1...Qc2
- 2.Sxf4#
- 2.Rxf6#
- 1...Qc5
- 2.Sxf4#
- 2.Rxf6#
- 1...Qc6
- 2.Sxf4#
- 1...Bc6
- 2.Rg8#
- 1...Bd7
- 2.Rxf6#
- 2.Rg8#
- 1...c6
- 2.Qg7#
- threat
- 1.d4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- R(c);N_GUARD::B(I)
- R(c);S_CUTB(a)::R1(E),XP(g)
- R(c);N_GUARD::B(I),XR(c)
- B(a);S_CUTR(c)::B(I)
- B(j);OGATE::R(J)
- B(j);N_SPINP(g),OGATE::R(J)
- P(i);OGATE::QAR1(G)
- P(i);N_SPINP(g),OGATE::QAR1(G)
- Tries
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- R(c);XS(A)::R1(E),XP(g)
- B(a);XS(A)::B(I)
- Q(b);::R1(E),XP(g)
- B(j);N_SPINP(g),OGATE::R(J)
- P(i);N_SPINP(g),OGATE::QAR1(G)
- Refutation
- Q(b);N_SPINP(g)
- Try
- R(J);
- Threat
- DUALS(2)
- Vars
- R(c);XR(J)::R1(E),XP(g)
- B(a);XR(J)::B(I)
- Q(b);::R1(E),XP(g)
- Q(b);N_GUARD,N_SPINP(g)::S(A),XP(d)
- B(j);::R1(E),XP(g)
- P(i);N_SPINP(g),OGATE::QAR1(G)
- Refutation
- B(j);N_SPINP(g)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(c);XQ(G)::R1(E),XP(g)
- B(a);XQ(G)::B(I)
- Q(b);::R1(E),XP(g)
- Q(b);N_GUARD,N_SPINP(g)::S(A),XP(d)
- B(j);N_SPINP(g),OGATE::R(J)
- Refutation
- P(i);N_SPINP(g)
- Try
- Q(G);XP(i)
- Threat
- QAR1(G)
- Vars
- B(j);OGATE::R(J)
- B(j);N_GUARD::QAB1(G),XB(j)
- Refutation
- Q(b);XQ(G)
- Try
- Actual
- P(B);
- Threat
- DUALS(2)
- Vars
- R(c);XP(B)::R1(E),XP(g)
- B(a);XP(B)::B(I)
- Q(b);::R1(E),XP(g)
- Q(b);N_GUARD,N_SPINP(g)::S(A),XP(d)
- B(j);N_SPINP(g),OGATE::R(J)
- P(i);N_SPINP(g),OGATE::QAR1(G)
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).