MESON Chess Problem Database
Problem Display
PID: 136244 (6bK/7n/4r2Q/2p3pN/1p1r4/5NR1/6P1/RBB4k w - - 0 1)
Birbrager, Isaak S
Rukhlis, Efim Naumovich
Source?, 1961-1962
#2
9 + 8
| 6490 | yacpdb | 0000 |
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Sf6#
- 1...Rd2
- 2.Sf6#
- 1...Rd3
- 2.Sf6#
- 1...Rd5
- 2.Sf6#
- 1...Rdd6
- 2.Sf6#
- 1...Rd7
- 2.Sf6#
- 1...Rd8
- 2.Sf6#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Re4
- 2.Sf4#
- 1...Re5
- 2.Sf4#
- 1...Re7
- 2.Sf4#
- 1...Re8
- 2.Sf4#
- 1...g4
- 2.Sf6#
- 1...Rd1
- Tries
- 1.Bd3?
- threat
- 2.Be3#
- 1...Rxd3
- 2.Sf6#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 2.Bxe3#
- 1...Ra6
- 2.Ba3#
- 1...Rc4!
- threat
- 1.Bg6?
- threat
- 2.Sf4#
- 1...Rxg6
- 2.Bd2#
- 1...Rf4
- 2.Sxf4#
- 2.Be3#
- 1...Rg4
- 2.Be3#
- 1...Rh4
- 2.Be3#
- 1...Sf6!
- threat
- 1.Bd2?
- threat
- 2.Be4#
- 1...Rxd2
- 2.Sf6#
- 1...Rd3
- 2.Sf6#
- 1...Rde4
- 2.Bxe4#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Ree4
- 2.Sf4#
- 2.Bxe4#
- 1...Ra6
- 2.Ba2#
- 1...Rc4!
- threat
- 1.Be3?
- threat
- 2.Bd3#
- 1...Rxe3
- 2.Sf4#
- 1...Rc4
- 2.Bc2#
- 1...Rd1
- 2.Sf6#
- 1...Rd2
- 2.Sf6#
- 1...Rd3
- 2.Sf6#
- 2.Bxd3#
- 1...Ra6!
- threat
- 1.Bf4?
- threat
- 2.Sf6#
- 1...Rxf4
- 2.Be4#
- 1...Rxh6
- 2.Bd3#
- 1...Rf6
- 2.Sxf6#
- 2.Bd3#
- 1...Rg6
- 2.Bd3#
- 1...Sf6
- 2.Sxf6#
- 1...Bf7!
- threat
- 1.Ra2?
- threat
- 2.Rh3#
- 1...Rd2
- 2.Sf6#
- 1...Re2
- 2.Sf4#
- 1...g4
- 2.Sf6#
- 1...Rh4!
- threat
- 1.Qxe6?
- threat
- 2.Qh3#
- 2.Qe1#
- 1...Rd1
- 2.Qh3#
- 1...Re4
- 2.Qh3#
- 1...Rg4
- 2.Qe1#
- 1...Rh4
- 2.Qe1#
- 1...g4
- 2.Qe1#
- 1...Bxe6!
- threat
- 1.Bd3?
- Keys
- 1.Be4!
- threat
- 2.Sf6#
- 2.Bd2#
- 1...Rdxe4
- 2.Be3#
- 1...Rexe4
- 2.Sf4#
- 1...Rxh6
- 2.Bd2#
- 1...Rd1
- 2.Sf6#
- 1...Rd2
- 2.Sf6#
- 2.Bxd2#
- 1...Rc4
- 2.Sf6#
- 1...Ra6
- 2.Sf6#
- 1...Rf6
- 2.Sxf6#
- 2.Bd2#
- 1...Rg6
- 2.Bd2#
- 1...Bf7
- 2.Bd2#
- 1...Sf6
- 2.Sxf6#
- 2.Bd2#
- threat
- 1.Be4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 13
- Sets
- R(c);N_GUARD::QAR(H)+S(G)
- R(f);N_GUARD::QAR(H)+S(G)
- P(e);S_CUTR(c)::QAR(H)+S(G)
- Tries
- Try
- B(B);
- Threat
- R(A)+B(C)
- Vars
- R(c);N_GUARD,XB(B)::QAR(H)+S(G)
- R(f);N_GUARD::QAR(H)+S(G)
- R(f);N_GUARD::R(A)+B(C)
- Refutation
- R(c);
- Try
- B(B);
- Threat
- QAR(H)+S(G)
- Vars
- R(f);N_GUARD,XB(B)::R(A)+B(C)
- R(c);N_GUARD::R(A)+B(C)
- Refutation
- S(g);
- Try
- B(C);
- Threat
- R(A)+B(B)
- Vars
- R(c);N_GUARD,XB(C)::QAR(H)+S(G)
- R(c);N_GUARD::QAR(H)+S(G)
- R(c);::R(A)+B(B),XR(c)
- R(f);N_GUARD::QAR(H)+S(G)
- R(f);N_GUARD::R(A)+B(B)
- Refutation
- R(c);
- Try
- B(C);
- Threat
- R(A)+B(B)
- Vars
- R(f);N_GUARD,XB(C)::QAR(H)+S(G)
- R(c);N_GUARD::R(A)+B(B)
- R(c);N_GUARD::QAR(H)+S(G)
- Refutation
- R(f);
- Try
- B(C);
- Threat
- QAR(H)+S(G)
- Vars
- R(c);N_GUARD,XB(C)::R(A)+B(B)
- R(f);N_GUARD,XQ(H)::R(A)+B(B)
- R(f);N_GUARD::R(A)+B(B)
- S(g);::QAR(H)+S(G),XS(g)
- Refutation
- B(h);
- Try
- R(A);
- Threat
- R(F)
- Vars
- R(c);N_GUARD::QAR(H)+S(G)
- R(f);N_GUARD::QAR(H)+S(G)
- P(e);S_CUTR(c)::QAR(H)+S(G)
- Refutation
- R(c);
- Try
- Q(H);XR(f)
- Threat
- DUALS(2)
- Vars
- R(c);::QAR2(H)
- R(c);::QAR(H)
- P(e);::QAR(H)
- Refutation
- B(h);XQ(H)
- Try
- Actual
- B(B);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD,XB(B)::R(A)+B(C)
- R(f);N_GUARD,XB(B)::QAR(H)+S(G)
- R(f);XQ(H)::R(A)+B(C)
- R(c);::QAR(H)+S(G)
- R(f);::QAR(H)+S(G)
- R(f);::R(A)+B(C)
- B(h);::R(A)+B(C)
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