MESON Chess Problem Database
Problem Display
PID: 235130 (3nQb2/3r4/8/1N1PBkPN/3p2RK/3P3p/5r2/q4n2 w - - 0 1)
Ahues, Herbert Siegfried Oskar
Schach, 2012
#2
9 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxd4#
- 1...Qc1
- 2.Sxd4#
- 1...Qd1
- 2.Sxd4#
- 1...Qe1
- 2.Sxd4#
- 1...Qa2
- 2.Sxd4#
- 1...Qa3
- 2.Sxd4#
- 1...Qa5
- 2.Sxd4#
- 1...Qa6
- 2.Sxd4#
- 1...Qa8
- 2.Sxd4#
- 1...Ra2
- 2.Rf4#
- 1...Rb2
- 2.Sxd4#
- 2.Rf4#
- 1...Rc2
- 2.Rf4#
- 1...Rd2
- 2.Rf4#
- 1...Re2
- 2.Rf4#
- 1...Rg2
- 2.Rf4#
- 1...Rh2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Sd2
- 2.Sg3#
- 1...Sh2
- 2.Sg3#
- 1...Se3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sc6
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Sb7
- 2.Qe6#
- 1...Sf7
- 2.Qe6#
- 1...Qb1
- Tries
- 1.Bg3?
- threat
- 2.Qe4#
- 1...Sxg3
- 2.Sxg3#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Re7
- 2.Sd6#
- 1...Be7
- 2.Sg7#
- 1...Se6
- 2.Qxe6#
- 1...Sd2!
- threat
- 1.Bxd4?
- threat
- 2.Qe4#
- 1...Qxd4
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Re7
- 2.Sd6#
- 1...Be7
- 2.Sg7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- 1...Qe1!
- threat
- 1.Bf4?
- threat
- 2.Qe4#
- 1...Rxf4
- 2.Rxf4#
- 1...Qe1
- 2.Sxd4#
- 1...Re7
- 2.Sd6#
- 1...Be7
- 2.Sg7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- 1...Re2!
- threat
- 1.Bd6?
- threat
- 2.Qe4#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Be7
- 2.Sg7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- 1...Re7!
- threat
- 1.Bf6?
- threat
- 2.Qe4#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Re7
- 2.Sd6#
- 1...Be7
- 2.Sg7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6!
- threat
- 1.Bc7?
- threat
- 2.Qe4#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Be7
- 2.Sg7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- 1...Re7!
- threat
- 1.Bg7?
- threat
- 2.Qe4#
- 1...Re7
- 2.Sd6#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- 1...Be7!
- threat
- 1.Bb8?
- threat
- 2.Qe4#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Be7
- 2.Sg7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- 1...Re7!
- threat
- 1.Bh8?
- threat
- 2.Qe4#
- 1...Re7
- 2.Sd6#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- 1...Be7!
- threat
- 1.Qg6+?
- 1...Kxe5
- 2.Qe4#
- 1...Kxg6!
- 1...Kxe5
- 1.Qxd7+?
- 1...Kxe5
- 2.Re4#
- 1...Se6
- 2.Qxe6#
- 1...Kg6!
- 1...Kxe5
- 1.Bg3?
- Keys
- 1.Bh2!
- threat
- 2.Qe4#
- 1...Qe1
- 2.Sxd4#
- 1...Re2
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Re7
- 2.Sd6#
- 1...Be7
- 2.Sg7#
- 1...Sd2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Se6
- 2.Qxe6#
- threat
- 1.Bh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 18
- Sets
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I)
- S(h);N_GUARD::QAB1(I),XS(h)
- Tries
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- S(b);XB(F)::S(H),XS(b)
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- R(g);N_GUARD,S_CUTB(i)::S(D)
- B(i);N_GUARD,P_PINP(G),S_CUTR(g)::S(H)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- S(b);
- Try
- B(F);XP(e)
- Threat
- QAB1(I)
- Vars
- Q(a);P_PINR(B),XB(F)::S(D),XQ(a)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- R(g);N_GUARD,S_CUTB(i)::S(D)
- B(i);N_GUARD,P_PINP(G),S_CUTR(g)::S(H)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- Q(a);
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- R(c);OGATE,P_PINR(B),XB(F)::R1(B),XR(c)
- Q(a);N_GUARD::S(D),XP(e)
- R(g);N_GUARD,S_CUTB(i)::S(D)
- B(i);N_GUARD,P_PINP(G),S_CUTR(g)::S(H)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- R(c);
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- B(i);N_GUARD,P_PINP(G),S_CUTR(g)::S(H)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- R(g);
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- R(g);N_GUARD,S_CUTB(i)::S(D)
- B(i);N_GUARD,S_CUTR(g)::S(H)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- Refutation
- S(h);
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- B(i);N_GUARD,P_PINP(G),S_CUTR(g)::S(H)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- R(g);
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- R(g);N_GUARD,S_CUTB(i)::S(D)
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- B(i);P_PINP(G)
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- B(i);N_GUARD,P_PINP(G),S_CUTR(g)::S(H)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- R(g);
- Try
- B(F);
- Threat
- QAB1(I)
- Vars
- R(g);N_GUARD,S_CUTB(i)::S(D)
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(h)
- Refutation
- B(i);P_PINP(G)
- Try
- Q(I);CHECK
- Vars
- K(f);OGATE,P-FLIGHT,XB(F)::QAR1(I)
- Refutation
- K(f);S_FLIGHT,XQ(I)
- Try
- Q(I);CHECK,XR(g)
- Vars
- K(f);P-FLIGHT,XB(F)::R1(B)
- S(h);N_GUARD,P_SPINS(h)::QAB1(I),XS(h)
- Refutation
- K(f);S_FLIGHT
- Try
- Actual
- B(F);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD::S(D),XP(e)
- R(c);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINR(B)::R1(B),XR(c)
- R(g);N_GUARD,S_CUTB(i)::S(D)
- B(i);N_GUARD,P_PINP(G),S_CUTR(g)::S(H)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(h);N_GUARD::QAB1(I),XS(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).