MESON Chess Problem Database

Problem Display
PID: 231354 (8/8/8/2N5/1N2p3/kpPpP3/p2K4/Q7 w - - 0 1)

Schwarz, Bela

Vas Femmunkasok Lapja, 1927

8/8/8/2N5/1N2p3/kpPpP3/p2K4/Q7

#2

6 + 5

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qxa2#
  • Tries
    • 1.Kc1?
      • threat
        • 2.Qb2#
      • 1...b2+
        • 2.Qxb2#
      • 1...d2+!
    • 1.Kd1?
      • 1...b2
        • 2.Qxa2#
      • 1...d2!
    • 1.Ke1?
      • 1...b2
        • 2.Qxa2#
      • 1...d2+!
    • 1.Sxa2?
      • threat
        • 2.Sc1#
        • 2.Sb4#
      • 1...bxa2
        • 2.Qc1#
      • 1...b2!
    • 1.Sc2+?
      • 1...bxc2
        • 2.Qc1#
      • 1...dxc2!
    • 1.Sbxd3?
      • threat
        • 2.Qb2#
      • 1...b2
        • 2.Qxb2#
      • 1...exd3!
    • 1.Sxb3?
      • threat
        • 2.Qxa2#
      • 1...Kxb3
        • 2.Qxa2#
      • 1...Ka4!
    • 1.Sa4?
      • 1...b2
        • 2.Qxa2#
      • 1...Kxa4!
    • 1.Sxe4?
      • 1...b2
        • 2.Qxa2#
      • 1...Ka4!
    • 1.Sca6?
      • 1...b2
        • 2.Qxa2#
      • 1...Ka4!
    • 1.Se6?
      • 1...b2
        • 2.Qxa2#
      • 1...Ka4!
    • 1.Sb7?
      • 1...b2
        • 2.Qxa2#
      • 1...Ka4!
    • 1.Sd7?
      • 1...b2
        • 2.Qxa2#
      • 1...Ka4!
    • 1.Qe1?
      • 1...Kb2
        • 2.Qc1#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...b2!
    • 1.Qf1?
      • 1...Kb2
        • 2.Qc1#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...b2!
    • 1.Qg1?
      • 1...Kb2
        • 2.Qc1#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...b2!
    • 1.Qh1?
      • 1...Kb2
        • 2.Qc1#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...b2!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qxb3#
      • 1...Kb2
        • 2.Qc1#
      • 1...a1S
        • 2.Qxa1#
      • 1...b2
        • 2.Qb3#
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::QAR1(A),XP(a)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • P(c);CHECK::QAB1(A),XP(c)
      • Refutation
        • P(d);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • P(d);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • P(d);CHECK
    • Try
      • S(E);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);N_GUARD,P_SPINP(c),SBLOCK,XS(E)::QAB(A)
      • Refutation
        • P(c);
    • Try
      • S(E);CHECK
      • Vars
        • P(c);XS(E)::QAB(A)
      • Refutation
        • P(d);XS(E)
    • Try
      • S(E);XP(d)
      • Threat
        • QAB1(A)
      • Vars
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • P(e);XS(E)
    • Try
      • S(F);XP(c)
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT,XS(F)::QAB1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(F);
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XS(F)
    • Try
      • S(F);XP(e)
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(F);
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(F);
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(F);
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(F);
      • Vars
        • P(c);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • P(c);
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);OGATEB::QAR2(A),XS(a)
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