MESON Chess Problem Database

Problem Display
PID: 161476 (4q3/7b/2pRPRpp/2p1k3/n3N2p/p5PK/Q7/7B w - - 0 1)

Apro, Laszlo

Dunaujvarosi Hirlap, 1960

4q3/7b/2pRPRpp/2p1k3/n3N2p/p5PK/Q7/7B

#2

8 + 10

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Sb6
      • 2.Qa1#
  • Tries
    • 1.Qa1+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb2!
    • 1.Qd2?
      • threat
        • 2.Qf4#
      • 1...Qxe6+
        • 2.Rdxe6#
      • 1...g5!
    • 1.Qf2?
      • threat
        • 2.Qf4#
      • 1...Qxe6+
        • 2.Rfxe6#
      • 1...g5!
    • 1.gxh4?
      • threat
        • 2.Qh2#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Sb2!
  • Keys
    • 1.Qh2!
      • threat
        • 2.gxh4#
        • 2.g4#
      • 1...Qxe6+
        • 2.g4#
      • 1...hxg3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(j);CHECK,OGATE,XP(G)::QAR1(B),XQ(j)
    • S(b);N_GUARD::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(B),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(j);CHECK,OGATE,XP(G)::R1(F),XQ(j)
      • Refutation
        • P(g);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(j);CHECK,OGATE,XP(G)::R1(H),XQ(j)
      • Refutation
        • P(g);
    • Try
      • P(C);XP(c)
      • Threat
        • QAB(B)
      • Vars
        • Q(j);CHECK,OGATE,XP(G)::QAR1(B),XQ(j)
      • Refutation
        • S(b);
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • Q(j);CHECK,XP(G)::QAB(B)+P(C)
      • P(c);OGATE,P_SPINP(c),XP(C)::QAB(B),XP(c)
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