MESON Chess Problem Database
Problem Display
PID: 254436 (8/1N1r1p2/1p3Qp1/3k4/bK1B4/4RnNp/p3Pp2/3R2bq w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Die Schwalbe, 1966
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Qxf3#
- 1...Rd6
- 2.Qxd6#
- 1...Rc7
- 2.Qd6#
- 1...Re7
- 2.Qd6#
- 1...Se1
- 2.Re5#
- 1...Sh2
- 2.Re5#
- 1...Sxd4
- 2.Rxd4#
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sg5
- 2.Re5#
- 1...Qh2
- Tries
- 1.Ba1+?
- 1...Sd2
- 2.Rxd2#
- 2.Rd3#
- 2.Re5#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Bxd1!
- 1...Sd2
- 1.Bb2+?
- 1...Sd2
- 2.Rxd2#
- 2.Rd3#
- 2.Re5#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Bxd1!
- 1...Sd2
- 1.Bc3+?
- 1...Sd2
- 2.Rxd2#
- 2.Rd3#
- 2.Re5#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Bxd1!
- 1...Sd2
- 1.Bc5+?
- 1...Sd2
- 2.Rxd2#
- 2.Rd3#
- 2.Re5#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Bxd1!
- 1...Sd2
- 1.Be5+?
- 1...Sd2
- 2.Rxd2#
- 2.Rd3#
- 1...Sd4
- 2.Rxd4#
- 1...Bxd1!
- 1...Sd2
- 1.Bxb6+?
- 1...Sd2
- 2.Rxd2#
- 2.Rd3#
- 2.Re5#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Bxd1!
- 1...Sd2
- 1.Red3?
- threat
- 2.e4#
- 1...Sxd4
- 2.Rxd4#
- 1...Rd6
- 2.Qxd6#
- 1...Re7
- 2.Qd6#
- 1...Sd2
- 2.Ba1#
- 2.Bb2#
- 2.Bxf2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bxb6#
- 1...Sh2
- 2.Ba1#
- 2.Bb2#
- 2.Bxf2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bxb6#
- 1...Sh4
- 2.Ba1#
- 2.Bb2#
- 2.Bxf2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bxb6#
- 1...Se5
- 2.Bxe5#
- 1...Sg5
- 2.Ba1#
- 2.Bb2#
- 2.Bxf2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bxb6#
- 1...Se1!
- threat
- 1.Re7?
- threat
- 2.e4#
- 1...Rxe7
- 2.Qd6#
- 1...Sxd4
- 2.Rxd4#
- 2.Re5#
- 1...Rd6
- 2.Qxd6#
- 1...Bc2
- 2.Rxd7#
- 1...Se1
- 2.Re5#
- 1...Sh2
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sg5
- 2.Re5#
- 1...Sd2!
- threat
- 1.Qxb6?
- threat
- 2.Qc5#
- 1...Rc7
- 2.Qd6#
- 1...Se5
- 2.Rxe5#
- 1...Rxb7!
- threat
- 1.exf3?
- threat
- 2.Re5#
- 1...Rd6
- 2.Qxd6#
- 1...Re7
- 2.Qd6#
- 1...Bxd1!
- threat
- 1.Ba1+?
- Keys
- 1.Rc3!
- threat
- 2.e4#
- 1...Sxd4
- 2.Rxd4#
- 1...Re7
- 2.Qd6#
- 1...Bc2
- 2.Qc6#
- 1...Se1
- 2.Qe5#
- 1...Sd2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- threat
- 1.Rc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(b);N_GUARD::QAB(G),XS(e)
- R(k);N_GUARD::QAR1(G),XR(k)
- R(k);N_GUARD::QAR1(G)
- S(e);N_GUARD::R1(C)
- S(e);N_GUARD::R1(C),XS(e)
- Tries
- Try
- B(F);CHECK
- Refutation
- B(g);XR(A)
- Try
- B(F);CHECK
- Refutation
- B(g);XR(A)
- Try
- B(F);CHECK
- Refutation
- B(g);XR(A)
- Try
- B(F);CHECK
- Refutation
- B(g);XR(A)
- Try
- B(F);CHECK
- Vars
- S(e);N_GUARD,P_SPINS(e)::R1(A),XS(e)
- Refutation
- B(g);XR(A)
- Try
- B(F);CHECK,XP(i)
- Refutation
- B(g);XR(A)
- Try
- R(C);
- Threat
- P(B)
- Vars
- S(e);OGATE,P_SPINS(e),XB(F)::R1(C),XS(e)
- R(k);N_GUARD::QAR1(G),XR(k)
- R(k);N_GUARD::QAR1(G)
- S(e);N_GUARD::R(C)+B(F),XS(e)
- Refutation
- S(e);
- Try
- R(C);
- Threat
- P(B)
- Vars
- R(k);N_GUARD,XR(C)::QAR1(G)
- R(k);N_GUARD::QAR1(G),XR(k)
- B(g);N_GUARD::R(C),XR(k)
- S(e);N_GUARD::R1(C)
- S(e);N_GUARD::R1(C),XS(e)
- Refutation
- S(e);
- Try
- Q(G);XP(i)
- Threat
- QAR1(G)
- Vars
- R(k);N_GUARD::QAR1(G)
- S(e);N_GUARD::R1(C),XS(e)
- Refutation
- R(k);P_PINQ(G),XS(H)
- Try
- P(B);XS(e)
- Threat
- R1(C)
- Vars
- R(k);N_GUARD::QAR1(G),XR(k)
- R(k);N_GUARD::QAR1(G)
- Refutation
- B(g);XR(A)
- Try
- Actual
- R(C);
- Threat
- P(B)
- Vars
- S(e);OGATE,P_SPINS(e),XB(F)::R1(A),XS(e)
- R(k);N_GUARD::QAR1(G)
- B(g);N_GUARD::QAB1(G)
- S(e);N_GUARD::QAR1(G)
- S(e);N_GUARD::QAR1(G),XS(e)
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