MESON Chess Problem Database
Problem Display
PID: 21895 (1q6/1P6/1BpbQ2N/r6p/2P2p2/5k1N/R3pP1K/5bR1 w - - 0 1)
Niemeijer, Meindert
2nd Place, Tijdschrift vd NSB, 1921
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxa2
- 2.Sg5#
- 1...Ra3
- 2.Sg5#
- 1...Ra4
- 2.Sg5#
- 1...Rc5
- 2.Ra3#
- 1...Rg5
- 2.Sxg5#
- 1...Ra6
- 2.Sg5#
- 1...Ra7
- 2.Sg5#
- 1...Ra8
- 2.Sg5#
- 1...Bg2
- 2.Qxe2#
- 1...Bxh3
- 2.Qxe2#
- 1...Bc5
- 2.Qxc6#
- 1...Be5
- 2.Sg5#
- 1...c5
- 2.Qd5#
- 1...Rxa2
- Tries
- 1.Sf5?
- threat
- 2.Sg5#
- 2.Sd4#
- 2.Sh4#
- 1...Bxh3
- 2.Sh4#
- 2.Qxe2#
- 1...Re5
- 2.Sg5#
- 1...Bg2
- 2.Sd4#
- 2.Sh4#
- 2.Qxe2#
- 1...Be5
- 2.Sg5#
- 1...Qd8
- 2.Sd4#
- 1...Qg8
- 2.Sd4#
- 2.Sh4#
- 1...Qh8
- 2.Sg5#
- 2.Sh4#
- 1...Rc5
- 2.Sd4#
- 2.Sh4#
- 2.Ra3#
- 1...Rd5
- 2.Sg5#
- 2.Sh4#
- 1...Bc5
- 2.Sh4#
- 2.Qxc6#
- 1...Be7
- 2.Sd4#
- 1...h4
- 2.Sg5#
- 2.Sd4#
- 2.Sxh4#
- 1...c5
- 2.Sh4#
- 2.Qd5#
- 1...Rxf5!
- threat
- 1.Rg2?
- threat
- 2.Sg1#
- 1...Be5
- 2.Sg5#
- 1...Re5!
- threat
- 1.Rg6?
- threat
- 2.Sg1#
- 1...Bxh3
- 2.Qxe2#
- 1...Be5
- 2.Sg5#
- 1...Rc5
- 2.Ra3#
- 1...Rg5
- 2.Sxg5#
- 1...Bc5
- 2.Qxc6#
- 1...c5
- 2.Qd5#
- 1...Re5!
- threat
- 1.Rg7?
- threat
- 2.Sg1#
- 1...Bxh3
- 2.Qxe2#
- 1...Be5
- 2.Sg5#
- 1...Rc5
- 2.Ra3#
- 1...Rg5
- 2.Sxg5#
- 1...Bc5
- 2.Qxc6#
- 1...c5
- 2.Qd5#
- 1...Re5!
- threat
- 1.Ra3+?
- 1...Rxa3
- 2.Sg5#
- 1...Bxa3!
- 1...Rxa3
- 1.Qd5+?
- 1...cxd5
- 2.Sg5#
- 1...Rxd5!
- 1...cxd5
- 1.Qf5?
- threat
- 2.Sg5#
- 2.Rg3#
- 2.Qd3#
- 1...Bxh3
- 2.Rg3#
- 2.Qd3#
- 1...e1Q
- 2.Sg5#
- 2.Rg3#
- 1...e1S
- 2.Sg5#
- 2.Rg3#
- 1...e1B
- 2.Sg5#
- 2.Rg3#
- 1...e1R
- 2.Sg5#
- 2.Rg3#
- 1...Qd8
- 2.Rg3#
- 2.Qd3#
- 1...Qe8
- 2.Sg5#
- 2.Rg3#
- 1...Qg8
- 2.Qd3#
- 1...Ra3
- 2.Sg5#
- 2.Rg3#
- 1...Rc5
- 2.Rg3#
- 2.Ra3#
- 2.Qd3#
- 1...Rd5
- 2.Sg5#
- 2.Rg3#
- 1...Re5
- 2.Sg5#
- 2.Rg3#
- 2.Qxf4#
- 1...Bg2
- 2.Sg5#
- 2.Qd3#
- 1...Bc5
- 2.Rg3#
- 1...Be7
- 2.Rg3#
- 2.Qd3#
- 1...h4
- 2.Sg5#
- 2.Qd3#
- 1...c5
- 2.Rg3#
- 2.Qd3#
- 2.Qd5#
- 1...Rxf5!
- threat
- 1.Sf5?
- Keys
- 1.Rg4!
- threat
- 2.Sg1#
- 1...Bxh3
- 2.Qxe2#
- 1...Re5
- 2.Rxf4#
- 1...Be5
- 2.Sg5#
- 1...Rc5
- 2.Ra3#
- 1...Bc5
- 2.Qxc6#
- 1...c5
- 2.Qd5#
- threat
- 1.Rg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- R(e);N_GUARD,XR(B)::S(E)
- R(e);N_GUARD::S(E)
- R(e);N_GUARD,S_CUTB(h)::R(B)
- R(e);N_GUARD::S(E),XR(e)
- B(a);N_GUARD::QAB1(H),XP(b)
- B(a);N_GUARD,XS(E)::QAB1(H),XP(b)
- B(h);OGATE::QAB(H),XP(g)
- B(h);S_CUTR(e)::S(E)
- P(g);N_GUARD,S_CUTR(e)::QAB(H)
- Tries
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- R(e);::S(E)
- B(h);::S(E)
- Q(i);::S(I)
- B(h);::S(I)
- Refutation
- R(e);XS(I)
- Try
- R(A);
- Threat
- S(E)
- Vars
- B(h);S_CUTR(e)::S(E)
- Refutation
- R(e);
- Try
- R(A);
- Threat
- S(E)
- Vars
- B(a);N_GUARD,XS(E)::QAB1(H),XP(b)
- B(h);S_CUTR(e)::S(E)
- R(e);N_GUARD,S_CUTB(h)::R(B)
- R(e);N_GUARD::S(E),XR(e)
- B(h);OGATE::QAB(H),XP(g)
- P(g);N_GUARD,S_CUTR(e)::QAB(H)
- Refutation
- R(e);
- Try
- R(A);
- Threat
- S(E)
- Vars
- B(a);N_GUARD,XS(E)::QAB1(H),XP(b)
- B(h);S_CUTR(e)::S(E)
- R(e);N_GUARD,S_CUTB(h)::R(B)
- R(e);N_GUARD::S(E),XR(e)
- B(h);OGATE::QAB(H),XP(g)
- P(g);N_GUARD,S_CUTR(e)::QAB(H)
- Refutation
- R(e);
- Try
- R(B);CHECK
- Vars
- R(e);XR(B)::S(E)
- Refutation
- B(h);XR(B)
- Try
- Q(H);CHECK
- Vars
- P(g);XQ(H)::S(E)
- Refutation
- R(e);XQ(H)
- Try
- Q(H);P_PINP(d)
- Threat
- DUALS(3)
- Vars
- Q(i);::QAR2(H)
- B(h);::R1(A)
- Refutation
- R(e);N_SPINP(d),XQ(H)
- Try
- Actual
- R(A);
- Threat
- S(E)
- Vars
- B(a);N_GUARD,XS(E)::QAB1(H),XP(b)
- R(e);S_CUTB(h)::R1(A),XP(d)
- B(h);S_CUTR(e)::S(E)
- R(e);N_GUARD,S_CUTB(h)::R(B)
- B(h);OGATE::QAB(H),XP(g)
- P(g);N_GUARD,S_CUTR(e)::QAB(H)
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).