MESON Chess Problem Database
Problem Display
PID: 49705 (2NKRB2/8/8/2pk4/2nN2Q1/2n5/8/8 w - - 0 1)
Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)
Izbrannie Zadachi, 1958
#2
6 + 4
| 3310 | 2345 Chess Problems | 1997 |
| 5454 | Near Snap | 2008 |
SOLUTION
- SOUND
- Sets
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sa2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sb2
- 2.Sb6#
- 1...Sd2
- 2.Sb6#
- 1...Sa3
- 2.Sb6#
- 1...Se3
- 2.Sb6#
- 1...Sa5
- 2.Sb6#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sd6
- 2.Sb6#
- 1...cxd4
- 2.Qe6#
- 1...Sb1
- Tries
- 1.Kc7?
- 1...cxd4
- 2.Qe6#
- 2.Qg8#
- 1...Se4
- 2.Qxe4#
- 1...Sb2
- 2.Sb6#
- 1...Sd2
- 2.Sb6#
- 1...Sa3
- 2.Sb6#
- 1...Se3
- 2.Sb6#
- 1...Sa5
- 2.Sb6#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sd6
- 2.Sb6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sa2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sb5+!
- 1...cxd4
- 1.Kd7?
- 1...Sb6+
- 2.Sxb6#
- 1...cxd4
- 2.Qe6#
- 2.Qg8#
- 1...Se4
- 2.Qxe4#
- 1...Sb2
- 2.Sb6#
- 1...Sd2
- 2.Sb6#
- 1...Sa3
- 2.Sb6#
- 1...Se3
- 2.Sb6#
- 1...Sa5
- 2.Sb6#
- 1...Sd6
- 2.Sb6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sa2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sb5
- 2.Qe4#
- 1...Se5+!
- 1...Sb6+
- 1.Sf3?
- threat
- 2.Qe6#
- 1...Kc6
- 2.Qd7#
- 1...Sd6
- 2.Se7#
- 1...Se5!
- threat
- 1.Sb5?
- threat
- 2.Qe6#
- 1...Kc6
- 2.Qd7#
- 1...Sxb5
- 2.Qe4#
- 1...Se5
- 2.Se7#
- 1...Sd6!
- threat
- 1.Se7+?
- 1...Kd6
- 2.Qe6#
- 1...Ke5!
- 1...Kd6
- 1.Re3?
- 1...cxd4
- 2.Qe6#
- 1...Se4
- 2.Qxe4#
- 1...Sb2
- 2.Sb6#
- 1...Sd2
- 2.Sb6#
- 1...Sa3
- 2.Sb6#
- 1...Sa5
- 2.Sb6#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sd6
- 2.Sb6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sa2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sb5
- 2.Qe4#
- 1...Sxe3!
- 1...cxd4
- 1.Re4?
- threat
- 2.Qe6#
- 1...Se5
- 2.Sb6#
- 1...Sxe4!
- threat
- 1.Re5+?
- 1...Sxe5
- 2.Sb6#
- 1...Kxe5!
- 1...Sxe5
- 1.Re6?
- threat
- 2.Se7#
- 1...Se4
- 2.Qxe4#
- 1...Sb2
- 2.Sb6#
- 1...Sd2
- 2.Sb6#
- 1...Sa3
- 2.Sb6#
- 1...Se3
- 2.Sb6#
- 1...Sa5
- 2.Sb6#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sd6
- 2.Sb6#
- 1...cxd4!
- threat
- 1.Qf3+?
- 1...Se4
- 2.Qxe4#
- 1...Kxd4!
- 1...Se4
- 1.Qf5+?
- 1...Kxd4
- 2.Bxc5#
- 1...Se5!
- 1...Kxd4
- 1.Qg2+?
- 1...Se4
- 2.Qxe4#
- 1...Kxd4!
- 1...Se4
- 1.Qf4?
- threat
- 2.Se7#
- 1...Se4
- 2.Qxe4#
- 1...Sb2
- 2.Sb6#
- 1...Sd2
- 2.Sb6#
- 1...Sa3
- 2.Sb6#
- 1...Se3
- 2.Sb6#
- 1...Sa5
- 2.Sb6#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sd6
- 2.Sb6#
- 1...cxd4!
- threat
- 1.Qh4?
- 1...Se4
- 2.Qxe4#
- 1...Sb2
- 2.Sb6#
- 1...Sd2
- 2.Sb6#
- 1...Sa3
- 2.Sb6#
- 1...Se3
- 2.Sb6#
- 1...Sa5
- 2.Sb6#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sd6
- 2.Sb6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sa2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sb5
- 2.Qe4#
- 1...cxd4!
- 1...Se4
- 1.Kc7?
- Keys
- 1.Sc6!
- threat
- 2.Qe6#
- 1...Kxc6
- 2.Qd7#
- 1...Se5
- 2.S6e7#
- 1...Sd6
- 2.S8e7#
- threat
- 1.Sc6!
This anticipates 23360(1971-1972), 35626(1991-1992)
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 14
- Sets
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- P(c);SBLOCK,XS(A)::QAB1(B)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(a);N_GUARD::QAB1(B)
- Refutation
- S(a);CHECK
- Try
- K(D);P-FLIGHT
- Vars
- S(b);CHECK,N_GUARD::S(C),XS(b)
- S(a);N_GUARD::QAB1(B),XS(a)
- S(b);N_GUARD::S(C)
- S(a);N_GUARD::QAB1(B)
- Refutation
- S(b);CHECK
- Try
- S(A);
- Threat
- QAB1(B)
- Vars
- K(d);S_FLIGHT::QAB1(B)
- S(b);SBLOCK::S(C)
- Refutation
- S(b);
- Try
- S(A);
- Threat
- QAB1(B)
- Vars
- K(d);S_FLIGHT::QAB1(B)
- S(a);N_GUARD,XS(A)::QAB1(B)
- S(b);SBLOCK::S(C)
- Refutation
- S(b);
- Try
- S(C);CHECK
- Vars
- K(d);P-FLIGHT::QAR1(B)
- Refutation
- K(d);P-FLIGHT
- Try
- R(E);
- Vars
- P(c);SBLOCK,XS(A)::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(a);N_GUARD::QAB1(B)
- Refutation
- S(b);XR(E)
- Try
- R(E);
- Threat
- QAB1(B)
- Vars
- S(b);N_GUARD::S(C)
- Refutation
- S(a);XR(E)
- Try
- R(E);CHECK
- Vars
- S(b);SBLOCK,XR(E)::S(C)
- Refutation
- K(d);P-FLIGHT,XR(E)
- Try
- R(E);
- Threat
- S(C)
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- Refutation
- P(c);XS(A)
- Try
- Q(B);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
- Refutation
- K(d);P-FLIGHT,XS(A)
- Try
- Q(B);CHECK
- Vars
- K(d);P-FLIGHT,XS(A)::B(F),XP(c)
- Refutation
- S(b);P_SPINS(b)
- Try
- Q(B);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
- Refutation
- K(d);P-FLIGHT,XS(A)
- Try
- Q(B);
- Threat
- S(C)
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- Refutation
- P(c);XS(A)
- Try
- Q(B);
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(a);N_GUARD::QAB1(B)
- Refutation
- P(c);XS(A)
- Try
- Actual
- S(A);
- Threat
- QAB1(B)
- Vars
- K(d);S_FLIGHT,XS(A)::QAB1(B)
- S(b);SBLOCK::S(A)
- S(b);SBLOCK::S(C)
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