MESON Chess Problem Database
Problem Display
PID: 261333 (3r1B1b/1pN5/p3Q3/N1p3nb/R1Pk1P2/4RpK1/pP3P2/n2r1B2 w - - 0 1)
Sammelius, Carel Johan Robert
2nd HM., Neue Zurcher Zeitung, 1987
#2
12 + 12
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Rd3#
- 1...Rc1
- 2.Rd3#
- 1...Re1
- 2.Rd3#
- 1...Rd3
- 2.Rxd3#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Ra8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Rb8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Rc8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Re8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Rxf8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bg7
- 2.Bxg7#
- 1...Sc2
- 2.Sb3#
- 1...Sb3
- 2.Sxb3#
- 1...Sh3
- 2.Re4#
- 2.Qe4#
- 1...Se4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Sxe6
- 2.Sxe6#
- 1...Sf7
- 2.Re4#
- 2.Qe4#
- 1...Sh7
- 2.Re4#
- 2.Qe4#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...Rb1
- Tries
- 1.Sxb7?
- threat
- 2.Bxc5#
- 1...Se4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Rxf8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Sxe6
- 2.Sxe6#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Sb3!
- threat
- 1.Sxa6?
- threat
- 2.Bxc5#
- 1...Se4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Rxf8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...bxa6
- 2.Sc6#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Rc8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Sb3
- 2.Sxb3#
- 1...b6
- 2.Sc6#
- 1...Sxe6!
- threat
- 1.Bd6?
- threat
- 2.Qd5#
- 1...Se4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Rxd6
- 2.Qxd6#
- 1...Sxe6
- 2.Sxe6#
- 1...Bf7!
- threat
- 1.Re5?
- threat
- 2.Bxc5#
- 1...Se4+
- 2.Rxe4#
- 1...Rxf8
- 2.Rd5#
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Bxe5
- 2.Qxe5#
- 1...Sxe6
- 2.Sxe6#
- 1...Rd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Sb3
- 2.Sxb3#
- 1...b6
- 2.Sc6#
- 1...Rxf1!
- threat
- 1.Qf5?
- threat
- 2.Bxc5#
- 2.Qxc5#
- 1...Se4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Rxf8
- 2.Qd7#
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Be5
- 2.Qxe5#
- 1...Sb3
- 2.Sxb3#
- 1...Se6
- 2.Sxe6#
- 2.Re4#
- 2.Qe4#
- 1...b6
- 2.Sc6#
- 1...Rd6!
- threat
- 1.Qb6?
- threat
- 2.Bxc5#
- 2.Qxc5#
- 1...Rxf8
- 2.Qd6#
- 1...Rd5
- 2.cxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Sb3
- 2.Sxb3#
- 1...Se6
- 2.Sxe6#
- 1...Se4+!
- threat
- 1.Qc6?
- threat
- 2.Bxc5#
- 2.Qxc5#
- 1...Se4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Rxf8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...bxc6
- 2.Sxc6#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Sb3
- 2.Sxb3#
- 1...Se6
- 2.Sxe6#
- 2.Re4#
- 2.Qe4#
- 1...b6!
- threat
- 1.Qe7?
- threat
- 2.Qxc5#
- 2.Qxd8#
- 1...Se4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Rxf8
- 2.Qd6#
- 2.Qd7#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxc5#
- 2.Qxd7#
- 1...Ra8
- 2.Qxc5#
- 2.Qd6#
- 2.Qd7#
- 1...Rb8
- 2.Qxc5#
- 2.Qd6#
- 2.Qd7#
- 1...Rc8
- 2.Qxc5#
- 2.Qd6#
- 2.Qd7#
- 1...Re8
- 2.Qxc5#
- 2.Qd6#
- 2.Qd7#
- 1...Bg4
- 2.Qxc5#
- 1...Bf7
- 2.Qxc5#
- 1...Be8
- 2.Qxc5#
- 1...Be5
- 2.Qxc5#
- 2.Qxe5#
- 1...Bf6
- 2.Qxc5#
- 2.Qxf6#
- 1...Sb3
- 2.Sxb3#
- 2.Qxd8#
- 1...Se6
- 2.Sxe6#
- 1...Sf7
- 2.Se6#
- 2.Re4#
- 2.Qxc5#
- 2.Qe4#
- 1...b6
- 2.Sc6#
- 2.Qxd8#
- 1...Rd5!
- threat
- 1.fxg5?
- threat
- 2.Re4#
- 2.Qe4#
- 1...Be5+
- 2.Qxe5#
- 1...Rxf1
- 2.Qe4#
- 1...Re1
- 2.Rd3#
- 2.Qe4#
- 1...Re8
- 2.Re4#
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Bg6!
- threat
- 1.Sxb7?
- Keys
- 1.b4!
- threat
- 2.Bxc5#
- 1...Se4+
- 2.Qxe4#
- 1...Rxf8
- 2.Qd5#
- 2.Qd7#
- 2.Qd6#
- 1...Sxe6
- 2.Sxe6#
- 1...cxb4
- 2.Qb6#
- 1...Rd3
- 2.Rxd3#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Sb3
- 2.Sxb3#
- 1...b6
- 2.Sc6#
- threat
- 1.b4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- R(b);N_GUARD::R1(D)
- R(b);N_GUARD::R1(D),XR(b)
- R(k);N_GUARD::QAR1(J),XR(k)
- R(k);N_GUARD::QAR2(J),XR(k)
- R(k);N_GUARD::QAR(J),XR(k)
- B(l);N_GUARD,P_PINP(H)::QAB1(J),XB(l)
- B(l);N_GUARD::QAB(J),XB(l)
- B(l);N_GUARD::B(L),XB(l)
- S(a);N_GUARD::S(I)
- S(a);N_GUARD::S(I),XS(a)
- S(g);XQ(J)::S(K),XS(g)
- P(j);N_GUARD::S(I)
- Tries
- Try
- S(I);XP(j)
- Threat
- B(L),XP(f)
- Vars
- S(g);XQ(J)::S(K),XS(g)
- R(k);N_GUARD::QAR1(J),XR(k)
- R(k);N_GUARD::QAR2(J),XR(k)
- Refutation
- S(a);
- Try
- S(K);XP(i)
- Threat
- B(L),XP(f)
- Vars
- P(j);N_GUARD,XS(K)::S(I)
- R(k);N_GUARD::QAR1(J),XR(k)
- R(k);N_GUARD::QAR2(J),XR(k)
- S(a);N_GUARD::S(I),XS(a)
- P(j);N_GUARD::S(I)
- Refutation
- S(g);XQ(J)
- Try
- B(L);
- Threat
- QAR1(J)
- Vars
- R(k);OGATE,XB(L)::QAR2(J),XR(k)
- S(g);XQ(J)::S(K),XS(g)
- Refutation
- B(h);
- Try
- R(D);
- Threat
- B(L),XP(f)
- Vars
- S(g);CHECK,N_GUARD::R1(D),XS(g)
- B(l);OGATE,P_PINP(H),XR(D)::QAB1(J),XB(l)
- S(g);XQ(J)::S(K),XS(g)
- R(k);N_GUARD::QAR2(J),XR(k)
- S(a);N_GUARD::S(I),XS(a)
- P(j);N_GUARD::S(I)
- Refutation
- R(b);XB(A)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(k);N_GUARD::QAR1(J),XR(k)
- B(l);N_GUARD,P_PINP(H)::QAB1(J),XB(l)
- S(a);N_GUARD::S(I),XS(a)
- P(j);N_GUARD::S(I)
- Refutation
- R(k);
- Try
- Q(J);P_PINP(f)
- Threat
- DUALS(2)
- Vars
- R(k);N_GUARD,XB(L)::QAR2(J)
- R(k);OGATE::R(F)+P(G),XR(k)
- R(k);N_GUARD::QAR2(J),XR(k)
- S(a);N_GUARD::S(I),XS(a)
- S(g);N_GUARD::S(K),XS(g)
- Refutation
- S(g);CHECK
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- P(j);XQ(J)::S(I),XP(j)
- R(k);N_GUARD::QAR1(J),XR(k)
- R(k);N_GUARD::QAR2(J),XR(k)
- S(a);N_GUARD::S(I),XS(a)
- Refutation
- P(j);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(k);N_GUARD::QAR2(J),XR(k)
- B(h);::QAB1(J),XP(f)
- S(g);N_GUARD::S(K),XS(g)
- Refutation
- R(k);
- Try
- P(H);XS(g)
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::QAB1(J),XB(l)
- R(b);XB(A)::QAR1(J)
- Refutation
- B(h);
- Try
- Actual
- P(B);
- Threat
- B(L),XP(f)
- Vars
- S(g);CHECK,N_GUARD::QAR1(J),XS(g)
- S(g);XQ(J)::S(K),XS(g)
- P(f);OGATEB,XP(B)::QAB(J)
- R(b);N_GUARD::R1(D),XR(b)
- R(k);N_GUARD::QAR1(J),XR(k)
- R(k);N_GUARD::QAR2(J),XR(k)
- S(a);N_GUARD::S(I),XS(a)
- P(j);N_GUARD::S(I)
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