MESON Chess Problem Database
Problem Display
PID: 206430 (8/4K3/2p5/1p1k1pp1/1R6/N1P1QP2/4n3/8 w - - 0 1)
Neunivako, Pavel Efimovich
Shakhmaty, 1925
#2
6 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sxc3
- 2.Qd4#
- 1...Sg3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...c5
- 2.Qe6#
- 1...Sc1
- Tries
- 1.Kf6?
- threat
- 2.Qe5#
- 1...c5
- 2.Qe6#
- 1...Kd6!
- threat
- 1.Sc4?
- threat
- 2.Sb6#
- 2.Qe5#
- 1...Sd4
- 2.Qxd4#
- 2.Qe5#
- 1...c5
- 2.Qe6#
- 1...bxc4!
- threat
- 1.Sxb5?
- threat
- 2.Sc7#
- 2.c4#
- 1...Sxc3
- 2.Sxc3#
- 2.Sc7#
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qe6#
- 1...cxb5!
- threat
- 1.Rc4?
- threat
- 2.Rc5#
- 2.Qc5#
- 2.Qe6#
- 1...c5
- 2.Rxc5#
- 2.Qxc5#
- 2.Qe6#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...bxc4!
- threat
- 1.Rd4+?
- 1...Sxd4
- 2.Qxd4#
- 1...Kc5!
- 1...Sxd4
- 1.Re4?
- threat
- 2.Re5#
- 1...fxe4
- 2.Qxg5#
- 1...c5!
- threat
- 1.Rf4?
- threat
- 2.Rxf5#
- 1...Sxf4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qe6#
- 1...Sg3
- 2.Qd4#
- 1...gxf4!
- threat
- 1.Rxb5+?
- 1...c5
- 2.Rxc5#
- 2.Qxc5#
- 2.Qe6#
- 1...cxb5!
- 1...c5
- 1.Qd2+?
- 1...Ke5
- 2.Qd6#
- 1...Sd4
- 2.Qxd4#
- 1...Kc5!
- 1...Ke5
- 1.Qd3+?
- 1...Ke5
- 2.Qd6#
- 1...Sd4
- 2.Qxd4#
- 1...Kc5!
- 1...Ke5
- 1.f4?
- threat
- 2.Qe5#
- 1...Sxf4
- 2.Qd4#
- 1...c5
- 2.Qf3#
- 2.Qe6#
- 1...gxf4!
- threat
- 1.Kf6?
- Keys
- 1.Rg4!
- 1...Sxc3
- 2.Qd4#
- 1...fxg4
- 2.Qxg5#
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qe6#
- 1...f4
- 2.Rxg5#
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sg3
- 2.Qd4#
- 1...Sf4
- 2.Qd4#
- 1...b4
- 2.c4#
- 1...Sxc3
- 1.Rg4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAR1(C)
- S(a);N_GUARD,XP(B)::QAR1(C)
- S(a);N_GUARD::QAR1(C),XS(a)
- P(f);SBLOCK::QAB1(C)
- Tries
- Try
- K(F);S_FLIGHT
- Threat
- QAR1(C)
- Vars
- P(f);SBLOCK::QAB1(C)
- Refutation
- K(c);P-FLIGHT
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- P(f);SBLOCK::QAB1(C)
- Refutation
- P(b);XS(A)
- Try
- S(A);XP(b)
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::QAR1(C),XS(a)
- P(f);SBLOCK::QAB1(C)
- Refutation
- P(f);XS(A)
- Try
- R(E);
- Threat
- DUALS(3)
- Vars
- S(a);N_GUARD::QAR1(C),XS(a)
- Refutation
- P(b);XR(E)
- Try
- R(E);CHECK
- Vars
- S(a);OGATE,XR(E)::QAR1(C),XS(a)
- Refutation
- K(c);P-FLIGHT
- Try
- R(E);
- Threat
- R1(E)
- Vars
- P(d);OGATEB,XR(E)::QAR(C),XP(e)
- Refutation
- P(f);
- Try
- R(E);
- Threat
- R(E),XP(d)
- Vars
- S(a);N_GUARD,XR(E)::QAR1(C)
- S(a);N_GUARD::QAR1(C),XS(a)
- P(f);SBLOCK::QAB1(C)
- S(a);N_GUARD::QAR1(C)
- Refutation
- P(e);XR(E)
- Try
- R(E);CHECK,XP(b)
- Refutation
- P(f);XR(E)
- Try
- Q(C);CHECK
- Vars
- K(c);OGATE,P-FLIGHT::QAB1(C)
- S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
- Refutation
- K(c);P-FLIGHT
- Try
- Q(C);CHECK
- Vars
- K(c);OGATE,P-FLIGHT::QAB1(C)
- S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
- Refutation
- K(c);P-FLIGHT
- Try
- P(D);
- Threat
- QAR1(C)
- Vars
- S(a);N_GUARD,XP(D)::QAR1(C)
- Refutation
- P(e);XP(D)
- Try
- Actual
- R(E);
- Vars
- S(a);N_GUARD,XP(B)::QAR1(C)
- P(d);OGATEB,XR(E)::QAR(C),XP(e)
- S(a);N_GUARD::QAR1(C),XS(a)
- P(f);SBLOCK::QAB1(C)
- P(d);OGATEB::R(E),XP(e)
- S(a);N_GUARD::QAR1(C)
- P(b);N_GUARD::P(B)
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