MESON Chess Problem Database

Problem Display
PID: 99293 (8/2N5/bP1R4/k7/4R3/3nQ3/1PNK4/3B4 w - - 0 1)

Molnar, Arpad

Magyar Sakkelet, 1952

8/2N5/bP1R4/k7/4R3/3nQ3/1PNK4/3B4

#2

9 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qa3#
      • 2.Qc3#
    • 1...Se1
      • 2.Qa3#
      • 2.Qc3#
    • 1...Sxb2
      • 2.Qc3#
    • 1...Sf2
      • 2.Qa3#
      • 2.Qc3#
    • 1...Sb4
      • 2.Qa3#
    • 1...Sf4
      • 2.Qa3#
      • 2.Qc3#
    • 1...Sc5
      • 2.Qc3#
    • 1...Se5
      • 2.Qa3#
      • 2.Qc3#
  • Tries
    • 1.Sa1?
      • threat
        • 2.Sb3#
        • 2.Ra4#
      • 1...Sxb2
        • 2.Sb3#
        • 2.Qc3#
      • 1...Bb5
        • 2.Sb3#
      • 1...Sc1
        • 2.Ra4#
        • 2.Qa3#
        • 2.Qc3#
        • 2.b4#
      • 1...Sb4
        • 2.Qa3#
      • 1...Sc5
        • 2.Qc3#
        • 2.b4#
      • 1...Bc4!
    • 1.Rd5+?
      • 1...Bb5
        • 2.Rxb5#
      • 1...Sc5!
    • 1.Qc5+?
      • 1...Bb5
        • 2.Qxb5#
      • 1...Sxc5!
    • 1.Qxd3?
      • threat
        • 2.Qxa6#
        • 2.Qa3#
        • 2.Qc3#
      • 1...Bc4
        • 2.Qa3#
      • 1...Bb5
        • 2.Qxb5#
        • 2.Qc3#
      • 1...Bb7
        • 2.Qb5#
        • 2.Qa3#
        • 2.Qc3#
      • 1...Bc8
        • 2.Qb5#
        • 2.Qa3#
        • 2.Qc3#
        • 2.Qd5#
      • 1...Bxd3!
    • 1.b4+?
      • 1...Sxb4
        • 2.Qa3#
      • 1...Ka4!
    • 1.b7?
      • threat
        • 2.Rxa6#
        • 2.Qb6#
      • 1...Bxb7
        • 2.Qb6#
      • 1...Sb4
        • 2.Qa3#
      • 1...Bb5
        • 2.Qb6#
      • 1...Sc5
        • 2.Qc3#
      • 1...Bc4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sb3#
        • 2.Sc6#
      • 1...Kb4
        • 2.Sc6#
      • 1...Bb5
        • 2.Sb3#
      • 1...Bc4
        • 2.Sc6#
      • 1...Bb7
        • 2.Sb3#
      • 1...Sc1
        • 2.Sc6#
        • 2.Qa3#
        • 2.Qc3#
      • 1...Sb4
        • 2.Qa3#
      • 1...Sc5
        • 2.Qc3#
      • 1...Se5
        • 2.Sb3#
        • 2.Qa3#
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE,XP(B)::QAB(E)
    • S(a);OGATE::QAR2(E)
    • S(a);OGATE::QAB(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::S(C)
        • S(a);OGATE::QAR2(E)
      • Refutation
        • B(c);
    • Try
      • R(H);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::R1(H),XB(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(E);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(E),XB(c)
      • Refutation
        • S(a);XQ(E)
    • Try
      • Q(E);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • B(c);::QAR2(E)
      • Refutation
        • B(c);XQ(E)
    • Try
      • P(B);CHECK
      • Vars
        • S(a);OGATE,XP(B)::QAR2(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XP(G)::QAB1(E)
        • S(a);OGATE::QAR2(E)
        • B(c);::QAB1(E)
        • S(a);OGATE::QAB(E)
      • Refutation
        • B(c);
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT::R(F)+S(C),DCHECK
      • B(c);::S(C)
      • S(a);OGATE::QAR2(E)
      • S(a);OGATE::QAB(E)
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