MESON Chess Problem Database
Problem Display
PID: 110648 (bNr5/1n2Q3/B2p3p/P1kpR1pR/p7/2Pp4/1n1P4/2N1K3 w - - 0 1)
Opdenoordt, Joseph J
De Maasbode, 1929
#2
10 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rxb8
- 2.Qc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sd1
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sxa5
- 2.Qa7#
- 1...Sd8
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...g4
- 2.Rxd5#
- 1...Rc6
- Tries
- 1.Kf1?
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qa7#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sd1
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sd8
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...g4
- 2.Rxd5#
- 1...Rf8+!
- 1...Rxb8
- 1.Re3?
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qa7#
- 1...d4
- 2.Re5#
- 1...Sd1
- 2.Sxd3#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sc4
- 2.Sxd3#
- 1...Sd8
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...g4!
- 1...Rxb8
- 1.Rf5?
- threat
- 2.Qe3#
- 1...Rxb8
- 2.Qc7#
- 1...Sd1
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Re8!
- threat
- 1.Rexg5?
- threat
- 2.Rxd5#
- 2.Qe3#
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qe3#
- 2.Qa7#
- 1...Sd1
- 2.Sxd3#
- 2.Rxd5#
- 1...Re8
- 2.Rxd5#
- 1...Sc4
- 2.Sxd3#
- 2.Rxd5#
- 1...Sd8
- 2.Qe3#
- 2.Qa7#
- 1...hxg5!
- threat
- 1.Re6?
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qxd6#
- 2.Qa7#
- 1...d4
- 2.Re5#
- 1...Sd1
- 2.Sxd3#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sc4
- 2.Sxd3#
- 1...Sd8
- 2.Qxd6#
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...g4!
- 1...Rxb8
- 1.Rhxg5?
- threat
- 2.Rxd5#
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qa7#
- 1...Sd8
- 2.Qa7#
- 1...hxg5!
- threat
- 1.Rxh6?
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qxd6#
- 2.Qa7#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sd1
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sd8
- 2.Qxd6#
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...g4!
- 1...Rxb8
- 1.Qxb7?
- threat
- 2.Sd7#
- 2.Rxd5#
- 2.Qb4#
- 2.Qb5#
- 2.Qb6#
- 2.Qa7#
- 1...Rxb8
- 2.Rxd5#
- 1...dxe5
- 2.Qb4#
- 2.Qb6#
- 2.Qe7#
- 1...Rc6
- 2.Sd7#
- 2.Qb4#
- 2.Qb5#
- 1...Rc7
- 2.Rxd5#
- 2.Qb4#
- 2.Qb5#
- 2.Qb6#
- 1...Rd8
- 2.Rxd5#
- 2.Qb4#
- 2.Qb5#
- 2.Qb6#
- 2.Qa7#
- 1...Re8
- 2.Sd7#
- 2.Qb4#
- 2.Qb5#
- 2.Qb6#
- 2.Qa7#
- 1...Sc4
- 2.Sxd3#
- 2.Sd7#
- 2.Rxd5#
- 2.Qb4#
- 2.Qb5#
- 1...Bxb7!
- threat
- 1.Qd7?
- threat
- 2.Qb5#
- 2.Qxc8#
- 1...Rxb8
- 2.Qb5#
- 2.Qc7#
- 1...Sxa5
- 2.Qb5#
- 2.Qa7#
- 1...Rc6
- 2.Qxc6#
- 1...Rc7
- 2.Qb5#
- 2.Qxc7#
- 1...Rd8
- 2.Qb5#
- 2.Qc6#
- 2.Qc7#
- 1...Re8
- 2.Qb5#
- 2.Qc6#
- 2.Qc7#
- 1...Rf8
- 2.Qb5#
- 2.Qc6#
- 2.Qc7#
- 1...Rg8
- 2.Qb5#
- 2.Qc6#
- 2.Qc7#
- 1...Rh8
- 2.Qb5#
- 2.Qc6#
- 2.Qc7#
- 1...Sd8
- 2.Qb5#
- 2.Qa7#
- 1...dxe5!
- threat
- 1.Qf7?
- threat
- 2.Rxd5#
- 2.Qxd5#
- 2.Qf2#
- 1...Rxb8
- 2.Qxd5#
- 2.Qc7#
- 1...Sxa5
- 2.Qf2#
- 2.Qa7#
- 1...Re8
- 2.Qxd5#
- 2.Qf2#
- 2.Qc7#
- 1...Rf8
- 2.Rxd5#
- 2.Qxd5#
- 2.Qc7#
- 1...Sd1
- 2.Sxd3#
- 2.Rxd5#
- 2.Qxd5#
- 1...Sc4
- 2.Sxd3#
- 2.Rxd5#
- 2.Qxd5#
- 1...Sd8
- 2.Qf2#
- 2.Qa7#
- 1...dxe5!
- threat
- 1.Qg7?
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qa7#
- 1...g4
- 2.Rxd5#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sd1
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sd8
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...dxe5!
- 1...Rxb8
- 1.Qh7?
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qa7#
- 1...g4
- 2.Rxd5#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sd1
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sd8
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...dxe5!
- 1...Rxb8
- 1.Kf1?
- Keys
- 1.Re2!
- 1...Rxb8
- 2.Qc7#
- 1...Sxa5
- 2.Qa7#
- 1...dxe2
- 2.d4#
- 1...d4
- 2.Re5#
- 1...Sd1
- 2.Sxd3#
- 1...Rc6
- 2.Sd7#
- 1...Rc7
- 2.Qxc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sc4
- 2.Sxd3#
- 1...Sd8
- 2.Qa7#
- 1...a3
- 2.Sb3#
- 1...g4
- 2.Qe3#
- 1...Rxb8
- 1.Re2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD,XS(J)::QAR2(I)
- R(k);N_GUARD::QAR2(I)
- S(a);N_GUARD::S(A),XP(b)
- S(i);OGATE,XP(E)::QAB(I)
- S(i);OGATE::QAB(I)
- P(c);N_GUARD::S(A)
- P(f);::R1(F),XP(e)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- S(i);OGATE,XP(E)::QAB(I)
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD::QAR2(I)
- S(a);N_GUARD::S(A),XP(b)
- S(i);OGATE::QAB(I)
- P(c);N_GUARD::S(A)
- P(f);::R1(F),XP(e)
- Refutation
- R(k);CHECK
- Try
- R(F);N_PINP(e),P_PINP(g)
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- S(i);OGATE,XP(E)::QAB(I)
- P(e);N_SPINP(g),OGATEB,P_SPINP(f)::R(F)
- S(a);N_GUARD::S(A),XP(b)
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD::QAR2(I)
- S(i);OGATE::QAB(I)
- P(c);N_GUARD::S(A)
- Refutation
- P(f);N_SPINP(g),P_SPINP(e)
- Try
- R(F);
- Threat
- QAB(I)
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- S(a);N_GUARD::S(A),XP(b)
- Refutation
- R(k);P_PINQ(I)
- Try
- R(F);XP(f)
- Threat
- DUALS(2)
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- R(k);P_PINQ(I)::R1(F),XP(e)
- Refutation
- P(h);N_SPINP(e),P_SPINP(g),XR(F)
- Try
- R(F);N_PINP(e),P_PINP(g)
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- P(e);N_SPINP(g),OGATEB,P_SPINP(f)::R(F)
- S(a);N_GUARD::S(A),XP(b)
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD::QAR2(I)
- P(c);N_GUARD::S(A)
- Refutation
- P(f);N_SPINP(g),P_SPINP(e)
- Try
- R(G);XP(f)
- Threat
- R1(F),XP(e)
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- S(i);OGATE,XP(E)::QAB(I)
- S(i);OGATE::QAB(I)
- Refutation
- P(h);XR(G)
- Try
- R(G);XP(h)
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD::QAR2(I)
- S(a);N_GUARD::S(A),XP(b)
- P(c);N_GUARD::S(A)
- Refutation
- P(f);
- Try
- Q(I);XS(i)
- Threat
- DUALS(6)
- Vars
- R(k);XS(J)::R1(F),XP(e)
- Refutation
- B(j);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- R(k);N_GUARD::QAR1(I),XR(k)
- Refutation
- P(g);N_SPINP(e),XR(F)
- Try
- Q(I);
- Threat
- DUALS(3)
- Refutation
- P(g);N_SPINP(e),XR(F)
- Try
- Q(I);
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- S(i);OGATE,XP(E)::QAB(I)
- P(f);::R1(F),XP(e)
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD::QAR2(I)
- R(k);N_GUARD,P_PINR(F)::QAR2(I)
- S(a);N_GUARD::S(A),XP(b)
- S(i);OGATE::QAB(I)
- P(c);N_GUARD::S(A)
- Refutation
- P(g);N_SPINP(e),XR(F)
- Try
- Q(I);
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- S(i);OGATE,XP(E)::QAB(I)
- P(f);::R1(F),XP(e)
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD::QAR2(I)
- R(k);N_GUARD,P_PINR(F)::QAR2(I)
- S(a);N_GUARD::S(A),XP(b)
- S(i);OGATE::QAB(I)
- P(c);N_GUARD::S(A)
- Refutation
- P(g);N_SPINP(e),XR(F)
- Try
- Actual
- R(F);N_PINP(e),P_PINP(g)
- Vars
- R(k);N_GUARD,XS(J)::QAR2(I)
- S(i);OGATE,XP(E)::QAB(I)
- P(b);OGATE,XR(F)::P(C)
- P(e);N_SPINP(g),OGATEB,P_SPINP(f)::R(F)
- S(a);N_GUARD::S(A),XP(b)
- R(k);SBLOCK::S(J)
- R(k);N_GUARD::QAR2(I),XR(k)
- R(k);N_GUARD::QAR2(I)
- S(i);OGATE::QAB(I)
- P(c);N_GUARD::S(A)
- P(f);N_SPINP(g),P_SPINP(e)::QAB(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).