MESON Chess Problem Database
Problem Display
PID: 266034 (2R5/pp4B1/qP1b3R/3kNPPK/1Pnp3Q/NP6/2B5/1b2r3 w - - 0 1)
Termaat, Nicolaas Ljsbrand Johanne
Probleemblad, 1950
#2
13 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxa3
- 2.bxc4#
- 1...Qa4
- 2.bxc4#
- 1...Qa5
- 2.bxc4#
- 1...Qxb6
- 2.bxc4#
- 1...Rc1
- 2.Qe4#
- 1...Rd1
- 2.Qe4#
- 1...Rf1
- 2.Qe4#
- 1...Rg1
- 2.Qe4#
- 1...Rh1
- 2.Qxh1#
- 1...Re4
- 2.Qxe4#
- 1...Bc5
- 2.Rxc5#
- 1...Bxe5
- 2.Rc5#
- 1...Bb8
- 2.Rc5#
- 1...Se3
- 2.Qe4#
- 1...Qxa3
- Tries
- 1.Sb5?
- threat
- 2.Qxd4#
- 2.bxc4#
- 1...Qxb6
- 2.bxc4#
- 1...Bxe5
- 2.Rc5#
- 2.bxc4#
- 1...Sxe5
- 2.Rxd6#
- 2.Qxd4#
- 1...Sxb6
- 2.Rxd6#
- 2.Qxd4#
- 1...Qa1
- 2.bxc4#
- 1...Qa2
- 2.Qxd4#
- 1...Rd1
- 2.Qe4#
- 2.bxc4#
- 1...Rh1
- 2.Qxh1#
- 2.bxc4#
- 1...Re4
- 2.Qxe4#
- 2.bxc4#
- 1...Ba2
- 2.Qxd4#
- 1...Bc5
- 2.Sc7#
- 2.Rxc5#
- 2.bxc4#
- 1...Sb2
- 2.Rxd6#
- 2.Qxd4#
- 1...Sd2
- 2.Rxd6#
- 2.Qxd4#
- 1...Sa3
- 2.Rxd6#
- 2.Qxd4#
- 1...Se3
- 2.Rxd6#
- 2.Qxd4#
- 2.Qe4#
- 1...Sa5
- 2.Rxd6#
- 2.Qxd4#
- 1...d3
- 2.Sc3#
- 2.Qxc4#
- 2.Qd4#
- 2.bxc4#
- 1...Qxb5!
- threat
- 1.Sd3?
- threat
- 2.Qxd4#
- 1...Qxb6
- 2.bxc4#
- 1...Bf4
- 2.Sxf4#
- 1...Rh1
- 2.Qxh1#
- 1...Re5
- 2.Sf4#
- 1...Bc5
- 2.Sf4#
- 2.Rxc5#
- 1...Be5
- 2.Rc5#
- 1...Se5
- 2.Sf4#
- 1...Re4!
- threat
- 1.Sf3?
- threat
- 2.Qxd4#
- 1...Qxb6
- 2.bxc4#
- 1...Rd1
- 2.Qe4#
- 1...Re4
- 2.Qxe4#
- 1...Bf4
- 2.Rc5#
- 1...Bc5
- 2.Rxc5#
- 1...Be5
- 2.Rc5#
- 1...d3
- 2.Qd4#
- 1...Rh1!
- threat
- 1.Sexc4?
- threat
- 2.Rxd6#
- 2.Qxd4#
- 1...Qxc4
- 2.bxc4#
- 1...Bxb4
- 2.Qxd4#
- 1...Rd1
- 2.Rxd6#
- 2.Qe4#
- 1...Rh1
- 2.Rxd6#
- 2.Qxh1#
- 1...Re4
- 2.Rxd6#
- 2.Qxe4#
- 1...Re5
- 2.Rxd6#
- 1...Re6
- 2.Qxd4#
- 1...Bh2
- 2.Rc5#
- 2.Qxd4#
- 1...Bg3
- 2.Rc5#
- 2.Qxd4#
- 1...Bf4
- 2.Rc5#
- 1...Bc5
- 2.Rxc5#
- 1...Be5
- 2.Rc5#
- 1...Bc7
- 2.Qxd4#
- 1...Be7
- 2.Qxd4#
- 1...Bb8
- 2.Rc5#
- 2.Qxd4#
- 1...Bf8
- 2.Qxd4#
- 1...d3
- 2.Rxd6#
- 2.Qd4#
- 1...Qxb6!
- threat
- 1.Sg6?
- threat
- 2.Qxd4#
- 1...Qxb6
- 2.bxc4#
- 1...Bf4
- 2.Sxf4#
- 1...Bc5
- 2.Sf4#
- 1...Be5
- 2.Se7#
- 1...Rd1
- 2.Qe4#
- 1...Rh1
- 2.Qxh1#
- 1...Re4
- 2.Qxe4#
- 1...Re5
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...d3
- 2.Qd4#
- 1...Bc7!
- threat
- 1.Sf7?
- threat
- 2.Qxd4#
- 1...Qxb6
- 2.bxc4#
- 1...Rd1
- 2.Qe4#
- 1...Rh1
- 2.Qxh1#
- 1...Re4
- 2.Qxe4#
- 1...Bf4
- 2.Rc5#
- 1...Bc5
- 2.Rxc5#
- 1...Be5
- 2.Rc5#
- 1...Se5
- 2.Rxd6#
- 1...d3
- 2.Qd4#
- 1...Re5!
- threat
- 1.Rxd6+?
- 1...Sxd6
- 2.Rc5#
- 1...Kxd6!
- 1...Sxd6
- 1.Rxc4?
- threat
- 2.Rxd4#
- 2.Qxd4#
- 1...Qxc4
- 2.bxc4#
- 1...Rxe5
- 2.Qxd4#
- 1...Bxb4
- 2.Qxd4#
- 1...Bxe5
- 2.Rc5#
- 1...Rd1
- 2.Qe4#
- 1...Rh1
- 2.Rxd4#
- 2.Qxh1#
- 1...Re4
- 2.Qxe4#
- 1...Bc5
- 2.Rxc5#
- 1...d3
- 2.Rd4#
- 2.Qd4#
- 1...Qxb6!
- threat
- 1.Qh1+?
- 1...Re4
- 2.Qxe4#
- 1...Rxh1+!
- 1...Re4
- 1.Sb5?
- Keys
- 1.Sd7!
- threat
- 2.Qxd4#
- 1...Qxb6
- 2.bxc4#
- 1...Rd1
- 2.Qe4#
- 1...Rh1
- 2.Qxh1#
- 1...Re4
- 2.Qxe4#
- 1...Re5
- 2.Sf6#
- 1...Bf4
- 2.Rc5#
- 1...Bc5
- 2.Rxc5#
- 1...Be5
- 2.Rc5#
- 1...Se5
- 2.Sf6#
- 1...d3
- 2.Qd4#
- threat
- 1.Sd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- Q(f);N_GUARD,XS(B)::P(C),XS(c)
- Q(f);N_GUARD::P(C),XS(c)
- Q(f);N_GUARD,XP(J)::P(C),XS(c)
- R(b);N_GUARD::QAB1(E)
- R(b);N_GUARD,P_PINQ(E)::QAB(E),XR(b)
- R(b);N_GUARD::QAB1(E),XR(b)
- B(g);N_GUARD::R1(M),XB(g)
- B(g);N_GUARD,XS(F)::R1(M)
- B(g);N_GUARD::R1(M)
- S(c);S_CUTR(b)::QAB1(E)
- Tries
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- Q(f);XP(J)::P(C),XS(c)
- Q(f);::P(C),XS(c)
- Q(f);::QAR1(E),XP(d)
- B(a);::QAR1(E),XP(d)
- Refutation
- Q(f);XS(B)
- Try
- S(F);
- Threat
- QAR1(E),XP(d)
- Vars
- Q(f);N_GUARD,XP(J)::P(C),XS(c)
- B(g);N_GUARD::S(F),XB(g)
- R(b);N_GUARD,P_PINQ(E)::QAB(E),XR(b)
- R(b);S_CUTB(g)::S(F)
- B(g);N_GUARD::R1(M)
- S(c);S_CUTB(g)::S(F)
- Refutation
- R(b);
- Try
- S(F);
- Threat
- QAR1(E),XP(d)
- Vars
- Q(f);N_GUARD,XP(J)::P(C),XS(c)
- R(b);N_GUARD::QAB1(E)
- R(b);N_GUARD::QAB1(E),XR(b)
- B(g);N_GUARD::R1(M)
- B(g);N_GUARD::R1(M),XB(g)
- P(d);::QAR1(E)
- Refutation
- R(b);P_PINQ(E)
- Try
- S(F);XS(c)
- Threat
- DUALS(2)
- Vars
- Q(f);OGATE,XS(F)::P(C),XQ(f)
- B(g);XP(D)::QAR1(E),XP(d)
- R(b);::R1(K),XB(g)
- R(b);::QAR1(E),XP(d)
- B(g);N_GUARD::R1(M)
- B(g);N_GUARD::R1(M),XB(g)
- B(g);::QAR1(E),XP(d)
- Refutation
- Q(f);XP(J)
- Try
- S(F);
- Threat
- QAR1(E),XP(d)
- Vars
- Q(f);N_GUARD,XP(J)::P(C),XS(c)
- B(g);N_GUARD::S(F),XB(g)
- B(g);N_GUARD::S(F)
- B(g);N_GUARD,S_CUTR(b)::S(F)
- R(b);N_GUARD::QAB1(E)
- R(b);N_GUARD,P_PINQ(E)::QAB(E),XR(b)
- R(b);N_GUARD::QAB1(E),XR(b)
- R(b);S_CUTB(g)::S(F)
- S(c);S_CUTB(g)::S(F)
- P(d);::QAR1(E)
- Refutation
- B(g);
- Try
- S(F);
- Threat
- QAR1(E),XP(d)
- Vars
- Q(f);N_GUARD,XP(J)::P(C),XS(c)
- R(b);N_GUARD::QAB1(E)
- R(b);N_GUARD,P_PINQ(E)::QAB(E),XR(b)
- R(b);N_GUARD::QAB1(E),XR(b)
- B(g);N_GUARD::R1(M)
- B(g);N_GUARD::R1(M),XB(g)
- S(c);N_GUARD::R1(K),XB(g)
- P(d);::QAR1(E)
- Refutation
- R(b);
- Try
- R(K);CHECK,XB(g)
- Vars
- S(c);SBLOCK,XR(K)::R1(M)
- Refutation
- K(e);P-FLIGHT,XR(K)
- Try
- R(M);XS(c)
- Threat
- DUALS(2)
- Vars
- Q(f);OGATE,XR(M)::P(C),XQ(f)
- R(b);XS(F)::QAR1(E),XP(d)
- B(g);XP(D)::QAR1(E),XP(d)
- B(g);N_GUARD,XS(F)::R1(M)
- R(b);N_GUARD::QAB1(E)
- R(b);N_GUARD::QAB1(E),XR(b)
- B(g);N_GUARD::R1(M),XB(g)
- Refutation
- Q(f);XP(J)
- Try
- Q(E);CHECK
- Vars
- R(b);N_GUARD,P_SPINR(b)::QAB1(E),XR(b)
- Refutation
- R(b);CHECK,XQ(E)
- Try
- Actual
- S(F);
- Threat
- QAR1(E),XP(d)
- Vars
- Q(f);N_GUARD,XP(J)::P(C),XS(c)
- R(b);N_GUARD::QAB1(E)
- R(b);N_GUARD,P_PINQ(E)::QAB(E),XR(b)
- R(b);N_GUARD::QAB1(E),XR(b)
- R(b);SBLOCK::S(F)
- B(g);N_GUARD::R1(M)
- B(g);N_GUARD::R1(M),XB(g)
- S(c);SBLOCK::S(F)
- P(d);::QAR1(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).